Correct Answer - C
On hydrolysis stachyrose gives four , sucrose gives two raffinose gives three and ribose gives no molecule, of monosaccharides . Thus only raffinose is a trisaccharide .
`underset("raffinose")(C_(18) H_(32)O_(16)) + H_(2) O to 3C_(6) H_(12) O_(6)` ltb