Assertion: Among the equimolecular solutions of urea, KCI and `K_(2)SO_(4)`, the solution of urea shows lowest osmotic pressure.
Reason: Urea is non-electrolyte while KCI and `K_(2)SO_(4)` are electrolytes.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true
