The right option for the statement "Tyndall effect is exhibited by" is :
NaCl Solution
Glucose solution
Starch Solution
Urea Solution
Tyndall effect is shown by Colloidal solutions.
Out of the given solutions, only starch solution can have particles of colloidal size.
Urea, glucose, and NaCl form true solutions and hence, cannot show Tyndall Effect.
The correct answer is option 3.