One mole of glucose reacts with ‘X’ moles of acetic anhydride. Number of chiral centres in glucose hemiacetal is/are ‘Y’. Number of carboxylic acid groups in glucaric acid is/are ‘Z’. Correct relation between X, Y. Z is  A) X-Y=0B) X+Y-Z=8C) (X×Z)-Y=5D) X-Y+Z=1