Discussion

Explanation:

The adjective “grossly” is a hint here, since it expresses the negative nature of the word in the first blank. ‘Grossly understood’ makes no sense- eliminate option 4.
It is absurd that the British would ‘misrepresent’ the toughness of local fighters; this is contextually incorrect since the sentence talks about fighting against them. Eliminate option 1.
The word “similar” does not fit the second blank contextually; it is illogical that the same kind of terrain should discomfit the British. Eliminate option 3.
Option 2 makes sense- the British had “underestimated” the local fighters, and they found the terrain very “different” from Europe.
Hence, the correct answer is option 2.

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