Answer : 4. "पे टी.एम. (PayTM)"
Explanation :

1. Paytm is an example of a valid e-wallet. E-wallet is a digital wallet that can be used to make payments both online and offline.

2. Paytm is a popular Indian e-wallet used by millions of people in India. Paytm can be used by users for online shopping, cash transfers, and bill payments.

Examples of valid e-wallets include-

Google Pay

PhonePe

Amazon Pay

Flipkart Pay

Mobikwik

Airtel Payments Bank

ICICI Pockets

HDFC Payzapp