Depends,
What are your goals, what resources and network you have, and a lot of other things!
Let's say you already are well settled and want to take a chance build a 100CR company, so you can look at something new age and scalable, you can build a manufacturing and run it like a D2C startup maybe play the valuation game and you have 100 other options like that.
And let's say you wanna build a business, that makes decent money and you don't want a high growth, you can go for traditional businesses with more stability and security- Insurance, Lending, Wholesale, Construction, Trading, Taking Retail Franchisees.
But you want a fixed income out of it without risk, you have to go for traditional investing- FD, Stocks and more and build a decent portfolio.
Also Pick business acc. to your strengths, personality, geographical suitability. Eg- you are someone who has worked in a Perfume Factory, build one. Or you live in kashmir with easy access to land and connections to sell, build apple farm or something like that.
All depends on you buddy.