Which of the following will block client to server pop$3$ TCP connections $($i$.$e$.$ outbound pop$3($note that the $-$I$$ argument $$inserts$$ the rule so that it will match first

$($before any default allow rules$)$:

$($a$)$ iptables $-$I FORWARD $-$i eth$1-$o eth$0-$p tcp $-$dport $110-$j DENY

$($b$)$ iptables $-$I FORWARD $-$i eth$1-$o eth$0-$p tcp $-$dport $995-$j DENY

$($c$)$ iptables $-$I FORWARD $-$i eth$0-$o eth$1-$p tcp $-$dport $110-$j DENY

$($d$)$ iptables $-$I FORWARD $-$i eth$0-$o eth$1-$p tcp $-$dport $995-$j DENY