Income from guest house and factory building

Hello Experts,

I have two Queries. So please provide me proper solution.

1. Suppose i have factory building which is let out for business purpose. So the question is whether rent income is taxable under Business Income or taxable as Income from House Property?

2. Further suppose i have guest house which is let out for commercial purpose. So whether such rent is taxable as business income or taxable as Income from house property?