When you mean 'Tourist' what is the letter type of visa that you are holding? That is, what is the first letter of the visa number?

I have an OCI visa, which starts with 'U' (as all OCI visas seem to do). It is, of course, a lifelong visa. I don't know what category it fits into, but I would not imagine that I need a separate visa to "do business" in India.

Another person in my family has the 10-year multiple entry tourist visa, but I forget the letter designation. Probably you could just check the terms on an indian consulate website.