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=5; True ribs are dorsally attached to the vertebral column and free on the ventral end
(B)X=24, Y=12; True ribs are attached to the vertebral column dorsally and to the sternum ventrally on both ends
(C)X=12, Y=7; True ribs are dorsally attached to the vertebral column and ventrally free
(D)X=12, Y=7; True ribs are dorsally attached to the vertebral column and ventrally attached to the sternum on both endsCorrect
Answer: (D)
Solution
Humans have X=12 pairs of ribs in total, of which only Y=7 pairs are true ribs, each attached dorsally to
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