The following are some statements about active masses.A)    Active mass of pure liquids and solids are taken as unity.B)    Active mass of electrolytes is taken as molality.C)     For dilute solutions of non-electrolytes, the active mass can be taken as molarity.The correct combination is.

A) Active mass of pure liquids and solids are taken as unity - True    For pure liquids and solids concentration changes are negligibleB) Active mass of electrolyte is taken as molality - False     Active mass electrolyte is taken as molarityC) Active mass of non- electrolyte is taken as molarity - True    A, C are ture