I chose answer $4$ and got it marked wrong. Could you provide an explanation?

Which of the following derivatives positions is NOT bullish?

Question $24$ options:

$1)$Long forward $($buy forward contract$)$

$2)$Long futures $($buy futures contract$)$

$3)$Short put $($sell put option$)$

$4)$Short call $($sell call option$)$

$5)$Buy call option