**Core Concept**
The autonomous zone of the ulnar nerve refers to a specific region of the hand that is innervated by the ulnar nerve and exhibits unique characteristics. This zone is responsible for the sensation and movement of the little finger and the ulnar half of the ring finger.

**Why the Correct Answer is Right**
The ulnar nerve is a branch of the brachial plexus that supplies the medial aspect of the forearm and the hand. The autonomous zone of the ulnar nerve is located in the hand and is responsible for the sensation and movement of the little finger and the ulnar half of the ring finger. This zone is innervated by the ulnar nerve's terminal branches, which are responsible for transmitting sensory information from the skin and motor signals to the muscles.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the correct location of the autonomous zone of the ulnar nerve.
* **Option B:** This option is incorrect because it refers to the median nerve, which is responsible for the sensation and movement of the thumb, index finger, and middle finger.
* **Option C:** This option is incorrect because it refers to the radial nerve, which is responsible for the extension of the wrist and fingers.

**Clinical Pearl / High-Yield Fact**
The ulnar nerve is often compressed or damaged at the elbow, leading to a condition known as cubital tunnel syndrome. This can result in numbness, tingling, and weakness in the hand, particularly in the little finger and the ulnar half of the ring finger.

**Correct Answer: D. The dorsal and palmar surfaces of the little finger and the ulnar half of the ring finger.**