Explanation:

- Option 1: SBI (State Bank of India) is a major public sector bank in India but did not win this specific award.

- Option 2: ICICI Bank ?? (Correct Answer): ICICI Bank won the Enterprise Mobility Award at the International Enterprise Award. The award recognized their leadership in using mobile technology for banking services.

- Option 3: PNB (Punjab National Bank) is another large public sector bank, but not the recipient of this award.

- Option 4: BOI (Bank of India) is notable but did not receive the Enterprise Mobility Award.

- Option 5: HDFC Bank is India’s top private bank, known for technology, but didn't win this award either.

So, the correct answer is ICICI Bank.