When you trade options, you're essentially placing a bet on if a stock will decrease, increase or remain the same in value; how much it will deviate from its current price; and in what time those changes will occur. Based on those parameters, you can choose to enter into a contract to buy or sell a company's stock.
You don't need a considerable sum of money to become an options trader. You can start small with a capital of less than Rs 2 lakhs too. However, as you start small, you need to be a careful trader so that you can cut down on the possibility of losses and enhance the return potential of your trades.