The head of a cockroach is triangular in shape and is formed of six segments fused together. It consists of compound eyes present on the head. The anterior of the head consists of mouth. The mouth is made of the labrum (upper lip) and labium (lower lip) long with a pair of mandibles and maxillae. Trochanter forms an important component of the leg of the cockroach. It is presently attached to the coxa and femur. So, the correct answer is option C.