Concept:Patna College is one of the oldest colleges in Bihar. It was founded during British rule to meet the demand for higher education.Explanation:The establishment year of Patna College is 1863. This is a well‑known historical fact. The college started under the University of Calcutta and later became part of Patna University after 1917. It has a long legacy of producing notable alumni in various fields. Among the given options, 1863 is the correct year. Option A (1865) and Option C (1861) are incorrect. Therefore, option B is the answer.Answer:Option B – 1863