The Muslim Personal Law (Shariat) Application Act, 1937 came into effect on :

7th October, 1937
7th October, 1938
5th September, 1937
4th September, 1937

The correct answer is (c). The Muslim Personal Law (Shariat) Application Act, 1937 came into effect on 5th September, 1937.

The Act provides for the application of Muslim personal law to Muslims in British India. It covers matters such as marriage, divorce, inheritance, and succession. The Act was passed by the Indian Legislative Assembly on 17 September 1937 and received the assent of the Governor-General on 23 September 1937. It came into effect on 5th September, 1937.

The Act was a major step in the codification of Muslim personal law in India. It was also a significant step in the recognition of Muslim personal law as a valid system of law in India. The Act has been amended several times since its enactment. The most recent amendment was made in 2005.

The Act has been controversial since its enactment. Some people have argued that it is discriminatory against women. Others have argued that it is a necessary safeguard for the religious freedom of Muslims. The Act continues to be debated in India today.

The other options are incorrect. Option (a) is incorrect because the Act came into effect on 5th September, 1937, not 7th October, 1937. Option (b) is incorrect because the Act came into effect on 5th September, 1937, not 7th October, 1938. Option (d) is incorrect because the Act came into effect on 5th September, 1937, not 4th September, 1937.