You hold a portfolio of an asset-or-nothing call and a cash-or-nothing put option written on a stock that does not pay dividends. The strike price of the options is the same. The payout of the cash-or-nothing option if it is exercised equals the strike price. Your portfolio is equivalent to

A plain-vanilla put option.

A covered call position, i.e., a long stock + short plain vanilla call.

A protective put position, i.e., a long stock + long put option.

None of the other answers are correct.

A plain-vanilla call option.