Answer: A. Anticonvulsants
Explanation: Nuropathic pain, or as doctors call it invisible pain, is associated with damage to the nerves, the nervous system. More specifically, it is a damage to the substance that surrounds the nerves, this substance is called myelin. Neuropathic pain can occur in both the peripheral and central nervous systems, and can be the result of injury that causes damage to myelin or some disease.
Anticonvulsants are used to reduce neuropathic pain, acting as, let's say, calm effect on the nerves, i.e. reducing their sensitivity, which occurs due to damage of mylelin.