1. Gita, Ravi and Suresh are children of mr. and mrs. Khanna
2. Renu, Raja and Sumit are children of mr. and mrs. Chopra
3. Sumit and Gita are married and Ashok and Sanjay their children
4. Garima and Ram are children of mr. and mrs. Chawla
5. Garima is married to Suresh and has three children Lata, Sonu, Raju
How is Ravi related to Raju?