All options except ‘SBI Bank’ are name of private banks, while ‘SBI Bank’ is a public sector bank. Hence, ‘SBI Bank’ is the odd one out. 1) HDFC Bank → HDFC Bank is India's largest private sector bank. 2) ICICI Bank → ICICI Bank is a leading private sector bank in India. 3) AXIS Bank → Axis Bank is the third largest private sector bank in India. 4) SBI Bank → State Bank of India (SBI) is an Indian multinational, public sector bank.