How is Gaurav related to Preeti?
I. Shekhar and Gaurav are the two sons of Raj and Preeti is the daughter of Shekhar.
II. Preeti’s father is son of Raj.
From I alone, we can find out that Gaurav is Uncle of Preeti. From II alone, we cannot say anything about the relation between Gaurav and Preeti. Therefore, the statement I alone is sufficient to answer the question.