message to server

A clinet C is comunitcating with the server S at TCP source port 2000 currently set to send next sequence number 123456. A malicious node is also connected to the same server at source port 3000 courrently set to send next sequence number 654321. malicious node M send a message to server. explain what will happen if the message is sent is ( note that RST means RST Flag in TCP packet is set

A. host M send RST, SEQ (654321), SRC(host M, port 3000) to to server S
B. host M send RST, SEQ (654321), SRC(host C, port 3000) to to server S
C. host M send RST, SEQ (123456), SRC(host C, port 2000) to to server S
D. host M send RST, SEQ (123456), SRC(host M, port 2000) to to server S