Correct statements areA) All Lanthanoids are more reactive than CalciumB) Ce+4 is a powerful oxidizing agent and its kinetics is rapidC) LuOH3is a stronger base than  LaOH3D) Samerium is steel hardE) IP1of early actioniods is lesser than that of early Lanthanoids

Initial Lanthanoids resemble ‘Ca’ and latter members resemble ‘Al’ in their reactivity; Ce+4 is a powerful oxidizing agent in Analytical chemistry because ECe+4/Ce+30  has high positive value (1.77V) but its action is slow;La(OH)3to Lu(OH)3 basic strength decreases due to decrease in ionic size and ionic character;