Choose the sentence with an adjective clause :

(A) The sum is so difficult that I cannot do it.
(B) He ran away because he was afraid.
(C) I shall help him for I like him.
(D) The dog that barks does not bite.

Choose the correct answer from the options given below:

(D)

The correct answer is Option (2) → (D)

An adjective clause (also called a relative clause) is a dependent clause that describes a noun or pronoun and usually starts with who, whom, whose, which, or that.

• "The dog that barks does not bite."
  • "that barks" is an adjective clause because it describes "the dog" (telling us which dog).

OTHER OPTIONS

• (A) The sum is so difficult that I cannot do it. → This contains an adverb clause of result ("that I cannot do it").
• (B) He ran away because he was afraid. → This contains an adverb clause of reason ("because he was afraid").
• (C) I shall help him for I like him. → This contains an independent clause ("for I like him"), not an adjective clause.