These were based primarily in Himachal Pradesh, where the treks were as gruelling as the terrain.
Answer
The correct answer is A: rigorous. Gruelling means extremely tiring and demanding. Rigorous means extremely thorough, exhaustive, or demanding, making it the closest synonym.
A.rigorous✓ Correct
B.egregious
C.unctuous
D.ominous
Explanation
Gruelling means extremely tiring and demanding. Rigorous means extremely thorough, exhaustive, or demanding, making it the closest synonym. Egregious means outstandingly bad or shocking; unctuous means excessively flattering or oily in manner; ominous means giving the impression that something bad is going to happen. Therefore, rigorous best captures the meaning of physically demanding and exhausting.
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