Complex sentence: He then did his B.Sc in physics and chemistry from St. Joseph's College, Bangalore and by the time he appeared for his civil services exam, he had also an M.Sc from the Indian Institute of Technology Madras (IITM).
Split into simpler sentences: He then did his B.Sc in physics and chemistry from St. Joseph's College, Bangalore. By the time he appeared for his civil services exam, he had also completed M.Sc from the Indian Institute of Technology Madras (IITM).