निम्नलिखित में से किस संविधान संशोधन अधिनियम ने भारत में मतदान की आयु 21 वर्ष से घटाकर 18 वर्ष कर दी थी?

Match the following Constitution Amendment Acts (List-I) with their respective Objectives (List-II): List-I (Amendment Act): a. The 1st Amendment Act, 1951 b. The 9th Amendment Act, 1960 c. The 52nd Amendment Act, 1985 d. The 101st Amendment Act, 2016 List-II (Objective): 1. Settled certain boundary disputes between the Governments of India and Pakistan 2. The acquiring of territories by India and transfer of certain territories to Bangladesh 3. Goods and Services Tax 4. Securing the constitutional validity of zamindari abolition laws 5. Anti-defection provisions

Through which Constitutional Amendment Act was the voting age in India reduced from 21 years to 18 years?