Correct option is C
Option (c) contains an error.
Detailed explanation: The phrase
“most highest” is a
double superlative, which is grammatically incorrect. The adjective
high forms its superlative as
highest (not most high in standard usage). We should use
only one superlative marker and include the article
the before it.
Correct sentence: Mount Everest is
the highest mountain in the world.
Grammatical rule used:
· Use
-est for short adjectives (high → higher →
highest).
·
Do not combine
most with an
-est form (avoid double comparatives/superlatives like more better, most fastest).
·
Example:
· Incorrect: She is the most oldest member of the team.
· Correct: She is the
oldest member of the team.
·
Information booster:
· Use
more/most with
long adjectives (e.g.,
more interesting,
most beautiful).
· With
short adjectives that take
-er/-est, don’t add
more/most (taller/highest, not more tall/most highest).