To determine which solution exhibits the Tyndall effect, we need to understand what the Tyndall effect is.$\\$The Tyndall effect is the scattering of light by particles in a colloid or in very fine suspensions.$\\$This effect is observed when the particle size is in the range of 1 to 1000 nm.$\\$Let's analyze each option:$\\$• NaCl solution:$\\$NaCl (sodium chloride) dissolves in water to form a true solution.$\\$In a true solution, the solute particles are ions or molecules that are too small to scatter light.$\\$Therefore, NaCl solution does not exhibit the Tyndall effect.$\\$• Glucose solution:$\\$Glucose also forms a true solution when dissolved in water.$\\$The molecules of glucose are too small to scatter light.$\\$Thus, glucose solution does not exhibit the Tyndall effect.$\\$• Starch solution:$\\$Starch forms a colloidal solution when mixed with water.$\\$The particles in a colloidal solution are large enough to scatter light.$\\$Therefore, starch solution exhibits the Tyndall effect.$\\$• Urea solution:$\\$Urea, like NaCl and glucose, forms a true solution in water.$\\$The particles are too small to scatter light.$\\$Hence, urea solution does not exhibit the Tyndall effect.$\\$Based on the above analysis, the correct option is:$\\$Option 3: Starch solution$\\$Therefore, the right option for the statement “Tyndall effect is exhibited by” is starch solution.$\\$