The correct option is C Thigh are striated and voluntary.
Thigh muscles are skeletal muscles, also called striated muscles, which are voluntary muscles that move the bones and support the skeleton. They are known as striated muscles due to their appearance. The cause of this stripy appearance is the bands of actin and myosin which form the sarcomere, found within the myofibrils. The heart has involuntary and striated smooth muscles. The intestine has unstriated and involuntary. The upper arm has skeletal muscle fibres fusiform in shape.