Cauda equina is a term given to:

A.A structure present over the tail of horse
B.A structure formed by union of thick ventral rami of 7th, 8th, 9th and 10th pairs of spinal nerves
C.A structure formed by union of dorsal rami of 7th, 8th, 9th and 10th pairs of spinal nerves
D.None of these


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