This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Afferent of Cremasteric reflex includes 
Select and explain. 
A. Genitofemoral nerve, B. Ilioinguinal, C. Ingiuino hypogastric, D. Pudendal nerve
A: Genitofemoral nerve
Answer: A: Genitofemoral nerve 
Explanation: CREMASTERIC REFLEX:-Upon stroking the skin of upper pa of medial side of thigh, there occurs a reflex contraction of muscle. It can be seen as elevation and retraction of the testis.Afferent:- genitofemoral nerve.Efferent: genital branch for cremaster muscle.More brisk in children.In UMN lesions,above segment L1 the reflex is lost.{Reference: BDC 6E pages no.206}