Answer: Option 'A' is correct.
Explanation:
Since we have given that
A triangle has three sides and a pentagon has five sides.
The above statement is considered as Conjunction.
As we know that when two simple sentences or statements are joined by a word then this word is known for conjunction.
After removing the conjunction, we get two different simple and complete statements.
Like if we remove 'and'.
The two statements would be
1) A triangle has three sides.
2) A pentagon has five sides.
Hence, Option 'A' is correct.