Which of the Following Represents an Intractable Pain Condition of the Fifth

Which of the following represents an intractable pain condition of the fifth (V) cranial nerve, also called tic douloureux, often treated with gamma knife radiosurgery, percutaneous rhizotomy, radiosurgery, or posterior fossa microvascular decompression?

A) Bell's palsy
B) Sciatica
C) Trigeminal neuralgia
D) AV malformation