A certain liquid has a melting point of –50 C and a boiling point of 150C. A thermometer is designed with this liquid and its melting and boiling points are designated as 0 L and 100L. The melting and boiling points of water on this scale are
(A) 25 L and 75 L, respectively
(B) 0 L and 100 L, respectively
(C) 20 L and 70 L, respectively
(D) 30 L and 80 L, respectively
