Identify the segment in the sentence which contains a grammatical error.
Freedom of speech is one of a fundamental right of every citizen.

Correct option is B

Option (b) contains an error.
Explanation:
The phrase “ one of” must be followed by a plural noun. So instead of “a fundamental right”, it should be “the fundamental rights”.
Correct sentence: Freedom of speech is one of the fundamental rights of every citizen.
Grammatical rule used:
After “one of”, always use “the + plural noun”.
Example:
· Incorrect: She is one of a great leader.
· Correct: She is one of the great leaders.