The correct option is A Thigh muscles are striated and voluntary.
Based on anatomy, the muscles in the thigh are divided into four main groups: the quadriceps (at the front of the leg), the hamstrings (at the back of the leg) and the adductors (at the inside of the leg) and abductors (at the outside of the leg). Skeletal muscle is a form of striated muscle tissue which is under the control of the somatic nervous system; that is, it is voluntarily controlled.