Out of the given four mixtures the one that appears clear and transparent is
Sugar and water
True Solution: A homogeneous mixture of two or more substances is called a solution. Usually, we think of a solution as a liquid that contains either a solid or a liquid or a gas dissolved in it. However, this is not true. We can also have a solid solution and gaseous solution as in the case of alloys and air respectively.
Components of a Solution: The substances present in a homogeneous solution are called components of the solution. A solution basically has two components, a solvent, and a solute.
Solvent: The component of a solution which is present in large proportion is called a solvent. Usually, a solvent is the LARGER component of the solution.
For example: In the solution of copper sulfate in water, water is the solvent. Similarly, in paints, turpentine oil is the solvent.
Solute: The component of the solution which is present in small proportion is called the solute. Usually, the solute is the SMALLER component of the solution.
For example: In the solution of common salt in water, the common salt is solute. Similarly, in carbonated drinks (soda water), carbon dioxide gas is the solute.
Explanation of correct option
In the solution of sugar in water, the sugar is solute and water is solvent. it is a true solution. A true solution is always clear and transparent, i.e., light can easily pass through it without scattering.
Explanation of Incorrect option
Suspensions A heterogeneous mixture of insoluble particles of solute, spread throughout a solvent, is called a suspension. The particle size (diameter) in a suspension is more than 10-5 cm. The particles have a tendency to settle down at the bottom of the vessel and can be filtered out because their size is bigger
then the size of the pores of the filter paper.
Example: Sand and water, Chalk power and water, Starch and water, etc.
Hence, Option(D) is the correct option.