Regarding CSMA$/$CA$,$ choose the FALSE statement.

$($a$)$ A protocol in which a carrier sensing scheme is used

$($b$)$ A data station that intends to transmit a frame firstly sends a jam signal. After waiting a sufficient time for all stations to receive that jam signal, the data station then transmits its frame.

$($ c$)$ While transmitting, if the data station detects a jam signal from another station, it continues to transmit for a random number of times and stop for a random number of times and retries.

$($d$)$ RTS$-$CTS exchange is used as its carrier sensing scheme