Flexor Carpi Ulnaris mainly pulls the hand toward the ulna (ulnar deviation) while also bending the wrist. Its fibers run from the medial epicondyle and the ulna to the pisiform, hook of hamate, and base of the 5th metacarpal, so as it contracts it directs the pull toward the little finger side of the hand and toward the palm, producing both wrist flexion and adduction. So the action matches flexing the wrist and bringing the hand medially, which is why that option is correct. The other choices describe extending the wrist, or moving it away from the ulna (abduction), or unrelated action like inspiration, none of which align with the muscle’s primary pull.

The tibialis anterior starts from the upper lateral surface of the tibia (proximal part) and also via the interosseous membrane between the tibia and fibula. This places the muscle on the front of the leg so its tendon runs to the foot to invert and dorsiflex the ankle. That’s why the lateral tibia in its proximal region is the correct origin. The fibula, medial tibia, or a distal tibial origin wouldn’t match how tibialis anterior is anchored and positioned.

The key idea is where a muscle attaches to the femur and how that relates to its function. The lesser trochanter is the insertion site for the iliopsoas tendon, which is formed by the fusion of the psoas major and iliacus. This muscle is the primary hip flexor, so attaching there allows it to lift the thigh toward the torso and help stabilize the pelvis when you stand or walk. Gluteus maximus attaches to the gluteal tuberosity and the iliotibial tract, not the lesser trochanter. Tensor fasciae latae inserts into the iliotibial tract rather than the femur itself. Infraspinatus attaches to the greater tubercle of the humerus, which is in the shoulder region, not the thigh. Therefore, the muscle that inserts on the lesser trochanter is the iliopsoas.

The muscle that inserts on the medial border of the scapula at the level of the spine is the rhomboid minor. It sits high on the medial border, near the spine of the scapula, and its fibers attach there from the spinous processes of C7 and T1. This placement lets it elevate and retract the scapula, stabilizing the shoulder blade against the thorax. In contrast, the rhomboid major inserts lower on the medial border (from the spine of the scapula down to the inferior angle), the trapezius attaches to the spine and acromion rather than the medial border itself, and the serratus anterior inserts along the costal (front) surface of the medial border rather than at the spine level.