Correct option is C
Option (c) contains an error.
· The phrase
"new pair of shoes" is incorrect because the article
"a" should be used before "pair" to indicate a single unit.
· The correct sentence should be:
"Alka bought a new pair of shoes for the party."
Grammatical rule used:
· When referring to a
pair (such as shoes, pants, or glasses), the correct structure is
"a pair of", not
"new pair of" without an article.
· Example:
"I bought a pair of gloves for the winter."