Choose the incorrect sentence :
(a) He hurt himself.
(b) James and myself went together.
(c) Behave yourself.
(d) She did it all by herself.
Answer options :

The correct answer is Option C ((b) only).

Key Points:
• Core Language Concept Tested: The question primarily tests the candidate's understanding of Pronouns in English grammar, specifically the correct usage of Reflexive Pronouns (words ending in -self or -selves).
• Why the Correct Option is Right: The official answer key marks option 3 as correct, identifying sentence (b) as the incorrect one. This is absolutely accurate according to grammatical rules. A reflexive pronoun like "myself" can only be used either as an object that reflects back to the subject (e.g., I hurt myself) or as an intensive pronoun for emphasis (e.g., I myself did it). It can never be used as the subject of a sentence. The correct sentence should be: "James and I went together."
• Common Exam Traps and Pitfalls: Candidates often pick up bad grammar habits from colloquial speech or corporate jargon, where people frequently say "Please contact John or myself." This is grammatically wrong but sounds formal, making it a highly effective MPSC trap.
• Elimination of Incorrect Options: Looking at the other choices, (a) correctly uses 'himself' as a direct object. (c) correctly uses 'yourself' as the object of an implied imperative subject "You". (d) correctly uses 'by herself' idiomatically to mean 'alone'. Thus, (b) is the sole grammatical anomaly.
• Preparation Strategy: Never use a reflexive pronoun where a subject pronoun (I, he, she, they) or object pronoun (me, him, her, them) is required.
• Key Takeaway: Remember: A reflexive pronoun (myself, himself) cannot be used as the subject of a sentence; use the personal pronoun (I, he) instead.