Find out the exact meaning of the underlined idiom in the given sentence :
"Most of her friends avoid talking to her as she is constantly blowing her own trumpet".

The correct answer is Option D (To boast about self).

Key Points:
• Core Language Concept Tested: The question primarily tests the candidate's understanding of common English Idioms and Phrases. Recognizing idiomatic expressions is a crucial area because they carry figurative meanings that differ drastically from their literal translations.
• Why the Correct Option is Right: The official answer key marks option 4 as correct. This is absolutely accurate because the idiom "blow one's own trumpet" (or 'toot one's own horn' in American English) means to boast, brag, or talk proudly about one's own achievements, skills, or successes. The context of the sentence (friends avoiding her) perfectly aligns with the irritating habit of constant bragging.
• Common Exam Traps and Pitfalls: MPSC often provides options that might metaphorically relate to making noise (like being busy or putting in effort). A common mistake candidates make here is ignoring the contextual clue in the sentence, which clearly implies an annoying personal trait.
• Elimination of Incorrect Options: Looking at the other choices, "To forget past enmity" is the meaning of 'bury the hatchet'. "To put in all possible efforts" equates to 'leave no stone unturned'. Thus, by a process of systematic elimination and idiom recognition, we arrive safely at the correct choice.
• Preparation Strategy: For future exams, read widely and memorize frequently tested idioms along with their contextual sentence usage.
• Key Takeaway: Remember: 'Blowing one's own trumpet' figuratively means to boast or brag about one's own achievements.