The correct option is B 18 moles of water
The number of water molecules is maximum in 18 moles of water.
(A) 18 grams of water corresponds to 1 mole and contains N water molecules where N is avogadro's number.
(B) 18 moles of water contains 18 N water molecules.
(C) 18 molecules of water
(D) 1.8 grams of water contain 0.1 N water molecules.