I would not suggest taking anything if you are going to India and staying at decent accomodations. Just bring about a bit of mosquito repellant.
Anti-malarial drugs often had side-effects .... including some of the nasty, near-term kind. I've seen plenty of 1 year to 12 year olds go from the US and UK to India and never have an issue due to such things. The bigger problem is related to what they eat/drink, heat stroke, or pollution/dust-related issues.