biolgy
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:

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: Option 1 : X = 24, Y = 12             True ribs are dorsally attached to vertebral column but are free on ventral side. Option 2 : X ...

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