Question

Mutations within an organism can occur in body cells or reproductive cells. Which type of mutation is seen in a sperm cell but not in a skin cell?

Answer 1

The answer is a germline mutation. 
The germline mutation is heritable variation in the lineage of germ cells. Germ cells are cells that give rise to the gametes, so a mutation in germ cell will be seen in a sperm cell but not in a skin cell.

Answer 2

The answer is D. Hope I helped.