Which college is better among IIHM, Delhi and IHM, Ghandinagar?

I would suggest you to first go and visit both the institutes. IHM offers a hotel management degree, and for entering IHM, you will have to appear for JEE exam. On the other hand, IIHM gives a Diploma of hotel management, hotel management degree from Bharatiyar University, Coimbatore and also an exc