NEET | 2017Excretory Products and their EliminationHard

Question

Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation :

Options

A.

X = 12, Y = 7
True ribs are attached dorsally to vertebral column and ventrally to the sternum.

B.

X = 12, Y = 5
True ribs are attahced dorsally to vertebral column and sternum on the two ends.

C.

X = 24, Y = 7

True ribs are dorsally attached to vertebral column but are free on ventral side.

D.

X = 24, Y = 12

True ribs are dorsally attached to vertebral column but are free on ventral side

Solution

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