Which of the following cannot be a valid Email ID?

Correct option is C

An email address cannot contain multiple @ (at-the-rate signs) as the @ symbol is used to separate the local part of the email (before @) from the domain part (after @).
Important Key Points:
1. The @ symbol is used once in a valid email address, separating the username and the domain name.
2. Email addresses can include numbers, letters, dots, and underscores.
3. Having multiple @ symbols violates the standard email format.
4. The structure of an email address is username@domain.com.
Knowledge Booster:
· The local part of the email address can include letters, numbers, and special characters like dots (.) and underscores (_).
· The domain part follows the @ symbol and typically ends with a domain suffix like .com, .net, or .org.
· Dots and numbers are allowed in both the local and domain parts of an email address, but multiple @ symbols are not allowed.