Correct option is C
Option (c) contains an error.
Explanation:
The sentence uses the correlative conjunction "Neither...or", which is incorrect. The correct pair is "Neither...nor".
Correct sentence:
"Neither the severe earthquake nor the subsequent famine could demoralise the people of the country."
Grammatical Rule Used:
Correlative conjunctions like either...or, neither...nor, both...and must be used as fixed pairs.
Example:
· Neither the rain nor the wind stopped the players.