The answer is: Delhi is the capital of India
The sentence is an example of a cause and effect reasoning. It helps to stablish the relationship between an event that comes first, and the one that takes place after the former. This type of reasoning provides the necessary information and details to understand why certain events happens as they do.
Number 2 is correct because this is an appositive sentence structure, which means one sentence is interrupted by another.
Hope I helped!
A clause is a unit of grammatical organization next below the sentence in rank and in traditional grammar said to consist of a subject and predicate.
