Which two muscles will you need to retract?

You are assisting the cardiac surgeon with a triple vessel bypass procedure. You are told to dissect out the saphenous vein but botch the procedure, as usual. Now the surgeon wants you to dissect a vessel ‘A’ from the arm to be used as a conduit for the bypass. During dissection of this vessel, mrcp

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A. Pronator teres and supinator
B. Brachioradialis and flexor carpi radialis
C. Flexor digitorum profundus and flexor pollicus longus
D. Palmaris longus and Flexor carpi ulnaris