The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
To descend a cragged / mountain, however, was most/ difficult and dangerous / than to ascend it.

Correct option is C

Option (c) contains an error.
Error Explanation: The phrase "was most difficult and dangerous than to ascend it" is grammatically incorrect because when comparing two things, the word "more" should be used, not "most".
The correct comparative structure is: "more + adjective + than" (not "most + adjective + than").
Hence, “was more difficult and dangerous than to ascend it” is the correct form.
Grammatical rule used:
When comparing two actions or entities, we use the comparative form of the adjective/adverb and pair it with ‘than’.
· Incorrect: was most difficult than
· Correct: was more difficult than
Example:
· Driving at night is more dangerous than driving during the day.