Question 1
Nia says: 'Pradeep is not my brother.' Rohit says: 'Pradeep is not my cousin.' Diya says: 'Pradeep is my sibling.' Only one person is lying. What is the true relationship between Nia and Pradeep?
If Diya is telling the truth that Pradeep is their sibling, and Nia says Pradeep is not their brother (but could be sister), then Pradeep is Nia's sister.