Station C is the "deaf station"

D wants to send a packet to E so it broadcasts a RTS packet, upon receiving the RTS packet from D, E replies with a CTS packet. Because C also receives the RTS packet from D, it will remain quiet while the transmission is going between D and E. A and B however didn't received the RTS packet from D. So, A sends an RTS packet to B asking for permission to send a data packet. B replies with a CTS packet. This time C doesn't understand that A is sending to B because it is "deaf". After D transmitted the packet to E, C wants to send a data packet to B. So, it broadcasts an RTS packet. This RTS packet collides with the data packet at B which destroy the entire data packet.