Which statement is incorrect with regards to the plantar surface of the foot?

• A. it is mostly supplied by the posterial tibial nerve
• B. the saphenous nerve is blocked between the medial mallelous and tibialis anterior
• C. often two nerves need to be anaesthatised for an adequate block
• D. for a posterior tibial nerve block anaesthetic is injected lateral to the posterial tibial artery at the upper border of the medial mallelous
• E. the sural nerve is blocked inferior to the lateral malleolus