Breaking down the question
This is a comment question built around a strong claim — that the Infant Mortality Rate (IMR) is the most sensitive index for measuring development. Your task is to evaluate the statement: to explain why IMR is such a powerful indicator, to defend the claim substantially, and then to qualify it by weighing rival and complementary measures.
The examiner is testing whether you grasp the sociological distinction between economic growth and development, and whether you can argue that a social indicator like IMR captures dimensions of well-being that income figures conceal. A balanced verdict — accepting the core insight while resisting the absolute word most — is what comment invites.
How to approach it
Define IMR and the broader idea of development. Explain why IMR is uniquely sensitive — it reflects nutrition, healthcare, sanitation, maternal education and gender equity all at once. Support this with the human-development perspective of Amartya Sen and Mahbub ul Haq.
Then introduce balance: note other indicators — life expectancy, literacy, the Human Development Index — and the limits of relying on any single measure. Conclude with a measured judgement. Draw on the note on the components of population growth for demographic grounding.
Model answer
The Infant Mortality Rate — the number of deaths of children under one year per thousand live births — is widely regarded as one of the most revealing indicators of a society's development. The claim rests on a crucial sociological distinction: development is not the same as economic growth. Rising national income can coexist with deprivation, whereas IMR measures whether the benefits of growth actually reach the most vulnerable.
Why IMR is so sensitive. An infant's survival depends on a whole web of social conditions — adequate nutrition, clean water and sanitation, accessible primary healthcare, immunisation, safe childbirth, and above all the education and status of the mother. A low IMR therefore signals that these conditions are broadly met; a high IMR exposes their absence. Because it aggregates so many dimensions of well-being into a single, hard-to-fake number, IMR acts as a summary index of the quality of life.
The human-development case. The work of Amartya Sen and Mahbub ul Haq reframed development as the expansion of human capabilities rather than the accumulation of income. IMR fits this vision precisely — it registers the most basic capability, survival itself, and is closely correlated with female literacy and gender equity, which Sen identifies as central to development. Kerala's low IMR despite modest per-capita income, contrasted with wealthier states, illustrates that IMR tracks social investment better than income alone.
Qualifications. Yet the word most invites caution. IMR is one indicator among several — life expectancy, adult and female literacy, and composite measures such as the Human Development Index each capture facets IMR does not. IMR says little about outcomes beyond infancy, about political freedoms, or about environmental sustainability. Data quality can be weak where registration is poor, and a single index can mask sharp internal inequalities of caste, class and region. No one number can exhaust so multidimensional a concept.
Assessment. IMR is indeed among the most sensitive indicators of development because it reflects the reach of social provision to the weakest members of society and reveals what income figures conceal. But it is best treated as a leading component of a battery of social indicators rather than a sole measure. Its great value is to insist that genuine development is judged not by aggregate wealth but by whether the most defenceless survive and thrive.
Examiner's perspective
Examiners reward candidates who anchor the answer in the growth-versus-development distinction, since that is the conceptual point the statement turns on. Weak scripts merely define IMR and agree; strong ones explain why the single number is so information-rich and then interrogate the absolute claim implied by most.
The best answers marshal the human-development framework of Sen and Haq, use a telling illustration such as Kerala, and close with a nuanced verdict that accepts IMR's exceptional sensitivity while placing it within a wider set of social indicators. That combination of endorsement and qualification is exactly what a comment question is designed to elicit.