Priya is married to Ravi, and they have a son named Aarav. Priya has one brother, Vijay, who is married to Neeta, and they have a daughter named Diya. How are Ravi and Neeta related to each other? Additionally, would Aarav and Diya be related, and if so, how?
Respond very briefly.
Ravi is married to Priya, and Neeta is married to Priya's brother, Vijay. This makes Ravi the brother-in-law of Vijay, and Neeta the sister-in-law of Priya. Since Ravi and Neeta are married to siblings, they are also related to each other by marriage as sister-in-law and brother-in-law.

Aarav is the son of Ravi and Priya, while Diya is the daughter of Vijay and Neeta. Since Priya and Vijay are siblings, their children, Aarav and Diya, are first cousins. They share a set of grandparents (the parents of Priya and Vijay), which solidifies their relationship as cousins.