As you have asked about the best small business to start in India, I am giving you some information about it, check below for the details

SEO (Search Engine Optimization) Consultancy
SEO (search engine optimization) consultancy is one business that is made for those people who are looking forward to be an Internet marketer

Blogging
Blogging is one of the best and profitable businesses you can actually think of.

Jewelry Maker
Indians adore jewelry. If you are crazy about jewelry, you can actually turn your love into a profession.

Gym & Fitness Center
Everyone wants to maintain their body with regular exercise and workout

Wedding Planning
Wedding ceremonies are given much value in India, and Indians are very particular about their wedding as they always like to make that day memorable for lifetime.

Food Restaurant Services

Event Management Business
Event Management is one of the rapidly growing businesses in India. Every year you can see lot of events like corporate events, events for award ceremonies and parties are organized.

Recruitment Firm
Setting up a recruitment firm is one of the successful businesses; due to increasing rate of unemployment these firms are huge in demand.

Interior Designer
Insurance Consultant
Catering
Real Estate Consultant
Yoga Center
Photographer
Travel Agency
Advertisement Agency
Fast Food Shop