This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Internal arcuate fibers of medulla comes from ? 
Select and explain. 
A. Dorsal nucleus of vagus, B. Hypoglossal nucleus, C. Nucleus of tractus solitariu, D. Nucleus gracilis & cuneatus
D: Nucleus gracilis & cuneatus
Answer: D: Nucleus gracilis & cuneatus 
Explanation: Ans. is 'd' i.e., Nucleus gracilis & cuneatusThe nucleus gracilis and cuneatus give rise to the internal arcuate fibres.The fibres cross to the opposite side where they form a paramedian band of fibres, called the medial lemniscus. In the lemniscus, the body is represented with the head posteriorly and the feet anteriorly.