Which of the following statements about the glenohumeral (shoulder joint) is INCORRECT?

• A. long tendon of biceps is extrasynovial
• B. subscapularis bursa communicates with joint cavity
• C. innervated by medial pectoral nerve
• D. branches of third part of axillary artery provide majority of blood supply
• E. surface area of humeral head is about four times greater than that of glenoid fossa