True or false a parallelogram can be classified as a rhombus

Can be a rhombus - yes

can be classified as a rhombus - no (here I understand this to mean "is always")

So some parallelograms can be rhombi, but not all of then necessarily are.

Rhombus has 4 equal sides, which can be parallel or not. If they are parallel then they are also a parallelogram (so some parallelograms can be rhombi too) but if they're not then not.

Some but not all parallelograms (shapes with 2 pairs of parallel sides) can be rhombi, but it is not true that all parallelograms can be classified as a rhombus. If both of the pairs of the parallelogram are equal then they are a rhombus, but if not (a typical reclangle) then this is a case of a parallelogram that is not a rhombus).

The final answer is false

Yes it is true it can be classified as rombus