Who will win a war between India and China?

If they go nuke, no one. It they stay non nuclear. It will be indefinite with and eventual armistice of some sort because the futility will eventually become apparent to both sides. Of course the armistice will be broken from time to time because people just can't help themselves. China is not as powerful as many people think. They can't carry their own weight. Their army is too big for material / personal management and acquisition / distribution. (logistics) They would have better luck with India than they would with a distant powerful country though.