Chemistry Question from JEE Main 2023 · 6 April, Shift 2

Consider the following pairs of solution which will be isotonic at the same temperature. The number of pairs of solutions is/are_____

A. $1 \, \text{M}$ aq. NaCl and $2 \, \text{M}$ aq. Urea

B. $1 \, \text{M}$ aq. CaCl$_2$ and $1.5 \, \text{M}$ aq. KCl

C. $1.5 \, \text{M}$ aq. AlCl$_3$ and $2 \, \text{M}$ aq. Na$_2$SO$_4$

D. $2.5 \, \text{M}$ aq. KCl and $1 \, \text{M}$ aq. Al$_2$(SO$_4$)$_3$