Choose the suitable option from the given alternatives to the ending of a formal letter:

Yours sincerely

The correct answer is Option (3) - Yours sincerely

The suitable option for the ending of a formal letter is:Yours sincerely

• "Yours sincerely" is a standard closing for formal letters, especially when you know the recipient's name.
• "Yours" is less formal and can be used, but "Yours sincerely" is more appropriate in formal contexts.
• "With love from" and "Bye, Bye" are informal and not suitable for formal correspondence.