The correct answer is option 4, United Nations Convention against Torture. This treaty was signed by India, but it has not been ratified yet. Ratification is the formal process by which a country gives its consent to be bound by an international treaty.

Option 1, the International Covenant on Economic, Social and Cultural Rights, has been signed and ratified by India. This treaty recognizes the right to work, adequate standard of living, education, and health among others.

Option 2, the International Convention on the Elimination of all Forms of Racial Discrimination, has also been signed and ratified by India. This treaty aims to eliminate racial discrimination in all its forms and promotes equal rights for all.

Option 3, the Convention on the Political Rights of Women, was signed and ratified by India. It ensures that women have the same political rights as men, including the right to vote and hold public office.

Therefore, the correct answer is option 4. Alert - The correct answer should be option 1.