The correct answer is: E. No error.
The sentence is grammatically correct. The subject and verb agree in number, and the sentence is complete. There are no punctuation errors.
The sentence is about Rajdeep, who always introduces himself by his first name and never mentions his family name. This is a common practice in some cultures, as it is seen as a way of showing respect for the individual’s privacy.
The sentence is well-written and easy to understand. It is clear who the subject is, what the action is, and what the result is. The sentence is also concise and to the point.