Hello Naman!

There is no upper age-limit for admission. However a candidate must be at least 17 years of age on the date of application. A graduation degree with 45% marks (40% for reserved category) is the basic qualification required. Universities like DU and BHU require minimum 50% marks while universities like Kurukshetra, Rohtak, Meerut require  only 45% marks in graduation. 

All the best. Thankyou