Correct Answer - Option 2 : Although
The correct option is 2.
The sentence contains a remark. In this sentence, we are pointing an adjective, which defines the quality of the girl i.e., ‘intelligent’.
In order to connect the sentence properly, we make use of a conjunction in the sentence. Here, we are using a conjunction at the beginning of the sentence which is called as the subordinate conjunction.
Following are the uses of the given subordinate conjunctions :
Unless : It is used to indicate the condition
Although : It is used to explain the fact or quality in the sentence.
Until : It is used to explain the time duration in the sentence.
So, the most appropriate conjunction that can be used in this sentence is ‘although’ because it helps in.explaining the fact about which we are talking in the sentence.
Correct sentence:
Although she is intelligent, she scores less marks.
