The correct answer is: a) The all-British Simon Commission.
The Simon Commission was a British parliamentary commission that was sent to India in 1927 to investigate the possibility of granting India self-government. The commission was composed of all British members, which led to widespread protests in India, including in Andhra Pradesh. The protesters felt that the commission was not representative of the Indian people and that it was not qualified to make recommendations on self-government. The protests were largely successful in forcing the commission to withdraw from India.
The other options are incorrect because:
- Option b) is incorrect because the increase in salt tax was a cause of the Salt March, which was led by Mahatma Gandhi in 1930.
- Option c) is incorrect because the Repressive Rowlatt Act was passed in 1919 and was a major cause of the Jallianwala Bagh massacre.
- Option d) is incorrect because the Partition of Bengal was a British decision that was announced in 1905.