Complex sentence: In 1941, Mir Osman Ali Khan Bahadur started his own bank, the "Hyderabad State Bank" (now State Bank of Hyderabad) as the state's central bank, which managed the "Osmania sikka", the currency of the state of Hyderabad.
Split into simpler sentences: In 1941, Mir Osman Ali Khan Bahadur started his own bank, the "Hyderabad State Bank" (now State Bank of Hyderabad) as the state's central bank. The bank managed the "Osmania sikka", the currency of the state of Hyderabad.