The correct answer is (a) Campbell.
The Forest Grievance Committee was set up in 1921 to investigate the grievances of forest workers in India. The committee was chaired by Sir John Campbell, a British civil servant who had served in India for many years. The committee’s report, which was published in 1922, made a number of recommendations for improving the working conditions of forest workers. These recommendations were largely implemented, and they had a significant impact on the lives of forest workers in India.
Option (b), Wyandham, is incorrect. Sir George Wyandham was a British civil servant who served as the Governor of Madras from 1919 to 1924. He was not involved in the Forest Grievance Committee.
Option (c), Finlay, is incorrect. Sir Robert Finlay was a British lawyer and politician who served as Lord Chancellor from 1916 to 1919. He was not involved in the Forest Grievance Committee.
Option (d), Ibbotson, is incorrect. Sir Reginald Ibbotson was a British civil servant who served as the Governor of the Punjab from 1925 to 1931. He was not involved in the Forest Grievance Committee.