The correct answer is A. put option.
A put option is a contract that gives the buyer the right, but not the obligation, to sell an underlying asset at a specified price on or before a specified date. The seller of the put option is obligated to buy the asset at the specified price if the buyer exercises the option.
A call option is a contract that gives the buyer the right, but not the obligation, to buy an underlying asset at a specified price on or before a specified date. The seller of the call option is obligated to sell the asset at the specified price if the buyer exercises the option.
A money back option is a type of option that gives the buyer the right to receive a refund of the premium paid for the option if the option expires out of the money.
An out of the money option is an option that has a strike price that is higher than the market price of the underlying asset (for a call option) or lower than the market price of the underlying asset (for a put option).
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