The following sentence has been divided into parts. One of them may contain an error. Select the part that contains the error from the given options.
Hurray! Here is the toy / what I was looking for / as my birthday gift.

Correct option is C

Option (c) contains an error.
Error: The phrase "what I was looking for" should be replaced with "that I was looking for".
Grammatical rule used: In defining relative clauses referring back to a noun (like "the toy"), we use “that” or “which”, not “what”.
Example: This is the book that I was searching for.
�� Information Booster: “What” = “the thing that”, and is not used as a relative pronoun to modify a noun.