A social group or class or people that are between the working class and the middle class belongs to the lower middle class.
The lowest income group earns in India estimates to earn between Rs. 300000- 500000 pa. Financially, the lower middle class are one of the sufferers in Indian social life.

Kishore, here are few sources of income that are generally practiced by the lower middle class to earn passive income in India;
Invest in the stock market
Professional talent
Broker in stock market
Working as a freelancer other than a full-time job
Sell insurance policies ( Insurance Agent )
Fund manager in stock market
Sell items on the offline/online market
Online media