Discussion
The Human Development Index (HDI) is a comparative measure of :
(a) Life expectancy
(b) Literacy
(c) Standard of living
(d) Income
Choose the correct answer :
Answer: B
The HDI is a comparative measure of (a), (b) and (d): life expectancy, literacy and income.
The UNDP's Human Development Index combines three dimensions: a long and healthy life (life expectancy at birth), knowledge (originally adult literacy and enrolment, now years of schooling), and a decent standard of living, measured by income per capita. In the question's terms, these are life expectancy, literacy and income.
'Standard of living' is the dimension that income measures, so the key treats income, not the broader phrase, as the component; options with (c) instead of (d), or without life expectancy, do not match.
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