Read the sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The corresponding letter of that part is the answer. If the given sentence is correct as it is, then choose option ‘No error’ as the answer response. (Ignore errors of punctuation, if any).

Learning a new language (A)/can be challenging, but its (B)/ a rewarding experience that (C)/opens up a world of possibilities (D).

Correct option is B

Correct Answer: B

Correct Sentence:
Learning a new language can be challenging, but it’s a rewarding experience that opens up a world of possibilities.

Sentence Structure:
Compound sentence = Independent clause + coordinating conjunction + Independent clause

Clause 1: Learning a new language can be challenging
Clause 2: it is a rewarding experience that opens up a world of possibilities

Part (A): “Learning a new language”

Rule: A gerund (verb + ing) can function as a subject.
Here, “Learning” is a gerund acting as a singular subject.

Example:
Reading improves concentration.

No error in (A).

Part (B): “can be challenging, but its”

Error: its

Rule:
Its = possessive determiner
It’s = contraction of “it is” or “it has”

After “but,” a new clause needs subject + verb.
The correct form should be it is, not the possessive “its.”

Example:
It’s a beautiful day.
The cat licked its paws.

Error is in (B).

Part (C): “a rewarding experience that”

Rule: That is a relative pronoun introducing a defining relative clause modifying “experience.”

Structure: Noun + that + verb

Example:
She bought a book that explains grammar.

No error in (C).

Part (D): “opens up a world of possibilities”

Rule: Subject–verb agreement
Singular noun “experience” takes singular verb “opens.”

Example:
He is a leader who inspires people.

No error in (D).