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Out of 'X' pairs of ribs in humans only ...

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

A

X = 12, Y = 17 Ture ribs are attached dorsally to vertebral column and ventrally to the sternum.

B

X = 12, Y = 15 True ribs are attached dorsally to vertebral column and sternum on the two ends.

C

X - 24, Y = 17 Ture ribs are dorsally attached to vertebral column but are free on ventral side.

D

X = 24, T = 12 True ribs are dorsally attached to vertebral column but are free on ventral side

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The correct Answer is:
A
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