Which muscle is a powerful agonist of adduction,medial rotation,and extension of the arm?

Question

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The latissimus dorsi is a large muscle that is a powerful agonist of adduction (bringing the arm towards the midline of the body), medial rotation (rotating the arm towards the body), and extension (bringing the arm back behind the body) of the arm. The deltoid muscle is involved in shoulder abduction, flexion, and extension, but not medial rotation. The pectoralis minor is involved in shoulder protraction, depression, and downward rotation, but not adduction, medial rotation or extension. The brachialis muscle is involved in elbow flexion.

Which Muscle Is a Powerful Agonist of Adduction,medial Rotation,and Extension