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: Physiology
Most afferent fibers from the lateral nucleus terminate in the primary visual cortex is 
Select and explain. 
A. Layer 1, B. Layer 2 & 3, C. Layer 4, D. Layer 5 & 6
C: Layer 4
Answer: C: Layer 4 
Explanation: Like almost all other portions of the visual cortex, the primary visual cortex has six distinct layers. Also, as is true for the other sensory systems, the geniculocalcarine fibres terminate mainly in layer 4.