Find the odd one.

1) Indian Post, Indian Railway, Bank of India, Air India,
Ans:- Bank of India

2) Life Insurance Corporation, Reserve Bank of India, Bharat Heavy Electricals Limited, ONGC.
Ans:- Bharat Heavy Electricals Limited

3) Pepsi, Coca cola, Dabur, Proctor & Gamble.
Ans:- Dabur

4) Tata Motors, Hindustan Aeronautics Limited, Steel Authority of India Limited, Gas Authority of India Ltd.
Ans:- Tata Motors