15.
The answer is: A
Explanation
The correct option is A: 44th Amendment Act.
Article 300A of the Indian Constitution, which provides that no person shall be deprived of his property save by authority of law, was inserted by the 44th Amendment Act of 1978. This amendment also deleted Article 19(1)(f) and Article 31, which were the original provisions that guaranteed the right to property as a fundamental right. The 44th Amendment Act reduced the right to property to a constitutional right, which can be regulated by ordinary law and cannot be challenged in the Supreme Court under Article 32. The amendment was intended to facilitate land reforms and social justice by giving more power to the state to acquire private property for public purposes.