Point out the complex sentence.

Step-by-Step Solution

A complex sentence contains:

One independent (main) clause, and
At least one dependent (subordinate) clause.

Let us examine each option.

Option A: "They are very wise people."
Subject: They
Verb: are
Predicate: very wise people

This contains only one independent clause and no subordinate clause.

Therefore, it is a simple sentence.

Option B: "You know me well."
Subject: You
Verb: know
Object: me

There is only one clause and no dependent clause.

Therefore, it is a simple sentence.

Option C: "She does not sing."
Subject: She
Verb: does not sing

This sentence also contains only one independent clause.

Therefore, it is a simple sentence.

Option D: "One who does not love one's country is a wretched person."
Main Clause: One is a wretched person.
Subordinate (Relative) Clause: who does not love one's country

The relative pronoun "who" introduces a subordinate clause modifying "One."

Since the sentence contains one main clause and one subordinate clause, it is a complex sentence.

Correct Answer: D

Grammar Concept
Simple Sentence: Contains only one independent clause.
Example: She sings.
Complex Sentence: Contains one independent clause and at least one dependent clause.
Example: She sings because she is happy.
Compound Sentence: Contains two or more independent clauses joined by a conjunction.
Example: She sings and he dances.