The Human Development Index (HDI) is introduced by :
UNDP
The Human Development Index is a composite measure of development that goes beyond income. It combines three dimensions: a long and healthy life (life expectancy at birth), knowledge (years of schooling) and a decent standard of living (per capita income).
The index was devised by economist Mahbub ul Haq with inputs from Amartya Sen and was first published in 1990 in the Human Development Report of the United Nations Development Programme (UNDP), which continues to compute and release it every year.
UNICEF works on child welfare, the IMF on monetary stability and balance of payments support, and the World Bank on development finance; none of them introduced the HDI.
Hence, the answer is UNDP.
Assertion (A) : Industrialization of an economy is considered synonymous with growth.
Reasoning (R) : The transfer of resources from agrarian to industrial may be capital or labour or both.
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