What is the 3-in-1 account minimum balance requirements?

Most banks offering 3-in-1 account asks for a Minimum Monthly Average Balance (MAB) in the saving bank account. The amount varies from the bank to the bank. For example:

Note: Not maintaining the minimum balance results in penalties by the bank. For example, ICICI Bank charges a penalty of Rs 100 + 5% of the shortfall in required MAB every month. HDFC charges Rs 100 to Rs 600 per month.