Name the 4 shoulder muscles whose tendons form the 'rotator cuff. '
a) Supraspinatus, Infraspinatus, Teres minor, Subscapularis
b) Deltoid, Pectoralis major, Latissimus dorsi, Trapezius
c) Biceps brachii, Triceps brachii, Brachialis, Brachioradialis
d) Sternocleidomastoid, Levator scapulae, Rhomboid major, Rhomboid minor
