The correct option is D Fibula
The legs of the cockroach have different lengths and functions. The upper portion of the leg is called as coxa, attaches the leg to the thorax.
The trochanter acts like a knee and lets the roach bend its legs.
The femur and tibia resemble thigh and shin bones.
The segmented tarsus acts like an ankle and foot. The hook-like tarsus also helps them to climb walls and walk upside down on ceilings.
Therefore, the correct answer is option C.