Guys that guy in the park was Amit's dad so how can he be Kundan ?
Or is Kundan a city guy not a villager ?
Kundan was a villager. If Amit is Kundan he must have been adopted and given a good life by this person just like Nandini. But,there is no indication that Amit would turn out to be Kundan. Krish can be Kundan since he wasn't much interested in studies and so he's a junior to Nandini. He might be elder than her. And,this would be revealed later on.