Which of the following are complex sentences ?
(a) In the green vase there were four dead roses.
(b) Farookh played the Sitar from 8 o'clock to 12 o'clock.
(c) If it doesn't rain, we will surely come.
(d) We don't know where they come from.

Question

Accepted Answer

Option 3 is correct because sentences (c) and (d) are complex sentences.

*   **Sentence (c): "If it doesn't rain, we will surely come."** This is a complex sentence because it contains an independent clause ("we will surely come") and a dependent clause ("If it doesn't rain") connected by the subordinating conjunction "if." The dependent clause cannot stand alone as a complete sentence.

*   **Sentence (d): "We don't know where they come from."** This is also a complex sentence. It has an independent clause ("We don't know") and a dependent clause ("where they come from"). The dependent clause acts as a noun clause, serving as the object of the verb "know." The word "where" introduces the dependent clause and makes it unable to stand alone.

Now, let's explain why the other options are incorrect:

*   **Option 1: Sentences (a) and (b)**
    *   Sentence (a): "In the green vase there were four dead roses." This is a simple sentence. It contains one independent clause.
    *   Sentence (b): "Farookh played the Sitar from 8 o'clock to 12 o'clock." This is also a simple sentence. It contains one independent clause.

*   **Option 2: Sentences (b) and (c)**
    *   Sentence (b): "Farookh played the Sitar from 8 o'clock to 12 o'clock." As explained above, this is a simple sentence.
    *   Sentence (c): "If it doesn't rain, we will surely come." This is a complex sentence. While sentence (c) is complex, the presence of the simple sentence (b) makes this option incorrect.

*   **Option 4: Sentences (b), (c) and (d)**
    *   Sentence (b): "Farookh played the Sitar from 8 o'clock to 12 o'clock." This is a simple sentence.
    *   Sentence (c): "If it doesn't rain, we will surely come." This is a complex sentence.
    *   Sentence (d): "We don't know where they come from." This is a complex sentence. While sentences (c) and (d) are complex, the presence of the simple sentence (b) makes this option incorrect.

Therefore, only Option 3 correctly identifies the complex sentences.