When was the ban on Hyderabad state Congress lifted?
A)1945
B)1946
C)1947
D)1950

Hint:The Nizam of Hyderabad owned the title of the “most Faithful Ally of the British”, the Nizam allowed the Razakars, a militant group to operate freely. He retained his powers till 17 September 1948, when Hyderabad was incorporated into the Indian Union.

Complete step by step answer:
Option A) 1945 is an incorrect option.
Option B) The Indian National Congress, under the Haripura resolution declared that the princely states are integral part of India. The standing committee of the People’s convention led to the formation of Hyderabad state congress, which opposed Nizam rule as well as Razakars. In response to this, the Nizam passed a New Public Safety Act, in 1938 on 6th September deeming Hyderabad State Congress unlawful.
A leader of Indian National Congress, P.M. Bapat declared his intention of launching Satyagraha when all the negotiations with the Nizami Government ended in failures. The activists of the state congress finally initiated Satyagraha in 1938 on 24th October by forming a committee of action. In 1942, Hyderabad congress launched a nonviolent campaign of Civil disobedience along with Quit India Movement but continued to be banned till 1946 and its jailed activists were behind the bars only. In April, 1946 the Nizam’s government finally ended the ban on the state Congress after the end of the Quit India Struggle in British India.So, option B is correct.
Option C) 1947 is not a correct option
Option D) 1950 is an incorrect option.

Note:The Hyderabad issue was widely discussed in the newspapers and journals in British India. However, the Indian National Congress did not support the Satyagraha launched by the state congress.