Hi Friend answer to ur question are as follow

strike price:Strike Price or Exercise Price - The strike or exercise price of an option is the specified/ pre-determined price of the underlying asset at which the same can be bought or sold if the option buyer exercises his right to buy/ sell on or before the expiration day.

explain in-the-money, at-the-money, out-of-the-money?

An option is said to be 'at-the-money', when the option's strike price is equal to the underlying asset price. This is true for both puts and calls.

A call option is said to be in-the-money when the strike price of the option is less than the underlying asset price. For example, a Sensex call option with strike of 3900 is 'in-the-money', when the spot Sensex is at 4100 as the call option has value.

The call holder has the right to buy a Sensex at 3900, no matter how much the spot market price has risen. And with the current price at 4100, a profit can be made by selling Sensex at this higher price.

On the other hand, a call option is out-of-the-money when the strike price is greater than the underlying asset price. Using the earlier example of Sensex call option, if the Sensex falls to 3700, the call option no longer has positive exercise value. The call holder will not exercise the option to buy Sensex at 3900 when the current price is at 3700.

what is call option?

A call option gives the holder (buyer/ one who is long call), the right to buy specified quantity of the underlying asset at the strike price on or before expiration date.

The seller (one who is short call) however, has the obligation to sell the underlying asset if the buyer of the call option decides to exercise his option to buy.

what is put option?

A Put option gives the holder (buyer/ one who is long Put), the right to sell specified quantity of the underlying asset at the strike price on or before a expiry date.

i understand ur confusion with these question bcoz even i was in ur place 3 months back ........... i will suggest u to learn basic option trading.. read some basic option book.. regards