Sri Krishna Sinha is the answer that matches the Bihar-specific fact asked in the question. Sri Krishna Sinha, commonly known as Sri Babu, was the first Chief Minister of Bihar after Indian independence in 1947. He served as Chief Minister from 1946 to 1961, making his tenure one of the longest in Bihar's history. He was a close associate of Mahatma Gandhi and a prominent freedom fighter from Bihar. Sri Krishna Sinha was also the last Premier of Bihar under British rule (from 1946) and continued as Chief Minister after independence. Jagannath Mishra served as Chief Minister of Bihar multiple times in later decades (1975, 1980, 1989) but was not the first CM. Binodanand Jha was the second Chief Minister of Bihar, serving from 1961 to 1963 after the death of Sri Krishna Sinha. Lalit Narayan Mishra was a prominent politician from Bihar but never served as Chief Minister. Sri Babu's contribution to Bihar's development in the post-independence era is widely recognized. Bihar GK questions frequently place neighbouring districts, rivers, historical centres, personalities or government institutions together as distractors, so recognition of a familiar name alone is insufficient. The alternatives Jagannath Mishra, Binodanand Jha, Lalit Narayan Mishra may be valid Bihar-related terms, but they do not satisfy the complete relationship asked here. Revise the complete pair ‘Who was the first Chief Minister of Bihar after independence? — Sri Krishna Sinha’ rather than an isolated option letter. This approach improves accuracy in BPSC, Bihar Police.