Complex sentence: Muhammad Mustafa Jauhar was the elder son of Hakeem Muhammad Muslim, who used to run his clinic in Bhagalpur during 1910, where Jauhar studied in an English School.
Split into simpler sentences: Muhammad Mustafa Jauhar was the elder son of Hakeem Muhammad Muslim. Hakeem sahib used to do his clinic (matab) in Bhagalpur during 1910, there Jauhar was studying in an English School.