Which of the following conventions is not ratified by India ........

Social Security Evolution of social security in India

Which of the following conventions is not ratified by India

Freedom of Association and Protection of the Right to Organise Convention, 1948 (No. 87)

Forced Labour Convention, 1930 (No. 29) (and its 2014 Protocol )

Abolition of Forced Labour Convention, 1957 (No. 105)

Equal Remuneration Convention, 1951 (No. 100)

Answer - Freedom of Association and Protection of the Right to Organise Convention, 1948 (No. 87)

India has so far not ratified Conventions 87, 98.
On 13 June 2017, the Government of India deposited with the International Labour Office the instruments of ratification of the two fundamental ILO Conventions concerning the elimination of child labour, the Minimum Age Convention, 1973 (No. 138) and the Worst Forms of Child Labour Convention, 1999 (No. 182) .

Hence option 1st is correct.