Assuming the compound to be completely dissociated in aqueous solution, density the pair of the solutions than can be epected to be isotonic at the same temperature :

Options

A. 0.01 M Urea and 0.01 M NaCl
B. 0.02 M Urea and 0.01 M `Na_(2)SO_(4)`
C. `0.3 M NaCI and 0.02 M MgCl_(2)`
D. `0.01` M Socrose and `0.02` M glucose