Setting time of cement increases by adding
(i)gypsum
(ii)sodium oxide
(iii)calcium chloride
[ A ] i
[ B ] i and ii
[ C ] i and iii
[ D ] i, ii and iii
(i)gypsum
(ii)sodium oxide
(iii)calcium chloride
[ A ] i
[ B ] i and ii
[ C ] i and iii
[ D ] i, ii and iii