Select the most appropriate option to fill in blank no. 3.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. incompetent.
Context: The narrator is criticising the school staff for not knowing their duties and failing to carry them out properly. So, we need a word that reflects lack of ability or skill in doing their job.
Meaning of the words:
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Incompetent: Lacking ability or skill to do something successfully
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Incorrigible: Impossible to change or improve (usually behaviour)
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Incredible: Hard to believe, amazing
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Inconvenient: Causing trouble or difficulty
Correct word: Incompetent
Reason Since the sentence says they were "unaware of their professional responsibilities and ___ in executing their duties", the second part should describe their lack of skill or ability. “Incompetent” does that clearly.
Hence, the chosen option will be correct.