Which of the following can’t be a valid email id ?

The correct answer is (A) An email id having multiple “@”

Explanation:
● A valid email address must contain only one “@” symbol, which separates the username and the domain name.
● Having more than one “@” makes the email format invalid and unreadable by email servers.
● Therefore, an email ID with multiple “@” symbols cannot be valid.

Information Booster:
● Standard email format is: username@domain.
● Dots (.) are allowed in the username part of an email ID.
● Underscores (_) are also permitted in the username.
● Digits (0–9) can be freely used in email IDs.
● Email format rules are defined under internet standards (RFC rules).

Additional Knowledge:
● Example of valid email: abc0@gmail.com
● Example of invalid email: abc@@gmail.com
● Email validation is important for successful communication over the internet.