**Question:** Contents of the Cubital fossa are all except

A. Ulnar nerve
B. Ulnar artery
C. Ulnar nerve and artery together
D. Supinator muscle

**Core Concept:**
The cubital fossa is a region on the medial aspect of the elbow joint, which contains various structures that are crucial for understanding their functions and anatomical relationships. The cubital fossa consists primarily of the ulnar nerve, artery, and vein, as well as the supinator muscle.

**Why the Correct Answer is Right:**
Option D, the Supinator muscle, is incorrect because it is one of the muscles that resides in the cubital fossa. The correct answer, Supinator muscle, is not mentioned as it is a muscle and not a nerve, artery, or vein.

**Why Each Wrong Option is Incorrect:**
Option A, the Ulnar nerve, is incorrect because it is a vital structure in the cubital fossa, responsible for sensory and motor functions in the distribution of the ulnar half of the hand, fingers, and wrist.

Option B, the Ulnar artery, is incorrect because it is a significant blood vessel in the cubital fossa, supplying blood to the hand and arm.

Option C, Ulnar nerve and artery together, is incorrect because both these structures are essential components of the cubital fossa, and selecting them together does not leave any key structures.

**Clinical Pearl:**
Understanding the anatomy and contents of the cubital fossa is crucial for clinical practice, as it helps diagnose and manage conditions like cubital tunnel syndrome, ulnar nerve palsy, and arterial occlusion. Anatomical knowledge is essential for accurate physical examination, differential diagnosis, and treatment planning.