Answer: Option (a) is the correct answer.
Explanation:
A heterogeneous mixture is defined as the mixture in which distribution of solvent particles is uneven throughout the solution.
For example, a mixture of sand and water is a heterogeneous mixture.
So, when we take different samples for the same heterogeneous mixture then there will be different composition of solute particles in each of them.
On the other hand, in a homogeneous solution there will be even distribution of solute particles into the solvent. Each sample of a homogeneous mixture will contain same composition of solute particles.
Thus, we can conclude that the statement different samples may not be exactly alike, is true of a heterogeneous mixture.
