Fill in the blank with the most appropriate option.
Despite the ______________ challenges faced during the expedition, the team managed to reach their destination.

Correct option is C

The correct option to fill in the blank is (c) formidable.
Explanation: “Formidable challenges” means difficult and daunting tasks. The sentence shows the team overcame great difficulties.
Example: The mountaineers climbed a formidable peak.
Meanings of all options:
· (a) Trivial: unimportant (तुच्छ)
· (b) Negligible: so small as to be unimportant (अत्यल्प)
· (c) Formidable: causing fear or respect through being large or powerful (भयानक/दुर्जेय)
· (d) Insignificant: not important (अमहत्वपूर्ण)