91. Out of 'X' pairs of ribs in humans only 'Y' pairs aretrue ribs. Select the option that correctly representsvalues of X and Y and provides their explanation :
(1) X = 12, Y = 7 True ribs are attacheddorsally to vertebralcolumn and ventrally to thesternum
(2) X = 12, Y = 5 True ribs are attacheddorsally to vertebralcolumn and sternum onthe two ends
(3) X = 24, Y = 7 True ribs are dorsallyattached to vertebralcolumn but are free onventral side
(4) X = 24, Y = 12 True ribs are dorsallyattached to vertebralcolumn but are free onventral side
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X = 12, Y = 7 True ribs are attacheddorsally to vertebralcolumn and ventrally to thesternum
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1 is correct bro
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