Complex sentence: He studied for a while at Presidency College, then affiliated with the University of Calcutta but passed BA examination in 1884 from the Calcutta Metropolitan Institution (now Vidyasagar College).
Split into simpler sentences: He studied for a time at Presidency College, then affiliated with the University of Calcutta. He passed his BA examination in 1884 from the Calcutta Metropolitan Institution (now Vidyasagar College).