Which of the following is suitable alternative for density of the solution, when molarity (m) and molality (m) of an aqueous solution of urea is same at fixed temperature ? (molecular wt of urea = 60 gm/mole) ?
(a) 1- 3M/50
(b) 1- M/25
(c) 50 + 3m/50
(d) 25 + 2 m/25