The correct answer is the State Bank of India. The full form of "SBI" in the banking sector is the State bank of India. This bank was established in 1806 as the Bank of Calcutta. It is a public sector bank. It is also the largest commercial bank in India. Indian government nationalized the Imperial bank of India in 1955 and changed the name to the state bank of India. Shri Dinesh Kumar Khara is the first CEO of the State Bank of India. Its headquarter is in Mumbai, Maharashtra. SBI is considered the 43rd largest bank in the world. There are 22,141 branches and 58,555 ATMs of SBI. Additional InformationSome of the Full forms related to banking:-RBI- Reserve Bank of India ATM- Automatic Teller Machine IFSC- Indian Financial System CodeICICI- Credit and Investment Corporation of India. HDFC- Housing Development Finance Corporation.