The correct answer is option 3, which states that the laws repealed by the Constitution of India are 1 and 3. Let`s analyze each option to understand why the answer is option 3.

Option 1 states that laws 1 and 2 have been repealed. However, this is not accurate as the Constitution of India did not repeal the Indian Independence Act, 1947. The Indian Independence Act, 1947 was the legislation that facilitated the partition of India and the creation of two separate dominions. It was not repealed by the Constitution of India.

Option 2 states that laws 2 and 4 have been repealed. However, this is also incorrect. The Constitution of India did not repeal the Preventive Detention Act, 1950. The Preventive Detention Act, 1950 was a law that enabled the government to detain individuals without trial. It was not repealed by the Constitution of India.

Option 3 states that laws 1 and 3 have been repealed. This is the correct answer. The Government of India Act, 1935, which was the governing law in colonial India, was repealed by the Constitution of India. Similarly, the Abolition of Privy Council Jurisdiction Act, 1949, which abolished