The correct answer is 4. The radial side is the lateral side of the forearm, which is innervated by the musculocutaneous nerve. The lateral antebrachial cutaneous nerve is a continuation of the musculocutaneous nerve.
The correct answer is 4. The radial side is the lateral side of the forearm, which is innervated by the musculocutaneous nerve. The lateral antebrachial cutaneous nerve is a continuation of the musculocutaneous nerve.