Out of 'X' pairs of ribs in humans, only 'Y' pairs are true ribs. Select the option that…

Biology · NEET · NTA ExamsLocomotion and Movement

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 provided their explanation:

  1. X = 12, Y = 7      True ribs are attached dorsally to vertebral column and ventrally to the sternum
  2. X = 12, Y = 5      True ribs are attached dorsally to vertebral column and sternum on the two ends
  3. X = 24, Y = 7      True ribs are dorsally attached to vertebral column but are free on ventral side
  4. X = 24, Y = 12      True ribs are dorsally attached to vertebral column but are free on ventral side

Answer

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

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