Which of the following pair of solutions can be expected to be isotonic at the same temperature ?
A. `0.1 M urea and 0.1 M NaCl `
B. 0.1 M NaCl and 0.1 M `Na_(2)SO_(4)`
C. 0.1 M `Ca(NO_(3))_(2)` and 0.1 M `Na_(2)SO_(4)`
D. 0.1 M glucose and 0.2 M
`MgCl_(2)`
