Conventionally, a valid email ID cannot include which of the following?

Correct option is D

The correct answer is (d) Multiple at signs (@).
Explanation:
● A standard email address is divided into two parts (the local part and the domain part) by a single '@' sign.
● Having multiple '@' signs would make the address invalid.
● Email IDs can typically include multiple digits, dots, and underscores.
Information Booster:
● Format: username@domain.com