Raj is Ravi's brother, and they have a sister named Priya. Raj has a daughter, Sunita, and Ravi has a son, Arjun. Their sister Priya has two children, Nikhil and Anjali. Explain how Arjun might be related to Sunita, and how Nikhil and Anjali might be related to Raj and Ravi respectively.
Provide a very brief response.
Arjun is the son of Ravi, and Ravi is Raj's brother. This makes Arjun Raj's nephew. Since Raj is Sunita's father, Arjun is Sunita's first cousin.

Nikhil and Anjali are the children of Priya, who is Raj and Ravi's sister. Therefore, Nikhil and Anjali are the niece and nephew of both Raj and Ravi. In relation to Raj, since Priya is his sister, this makes Nikhil and Anjali his niece and nephew. Similarly, as Priya is Ravi's sister, Nikhil and Anjali are Ravi's nephew and niece.