Achondroplasia Achondroplasia Is an Autosomal Dominant Disorder,however Homozygous Dominant Individuals Do

Achondroplasia
Achondroplasia is an autosomal dominant disorder,however homozygous dominant individuals do not have achondroplasia - they either die before birth or very shortly thereafter.The homozygous recessive condition is normal.A dwarf couple decide to have children.Use this information to answer the following question(s) .
-In the example above,what is probability that the couple will have a child with achondroplasia?

A) 0
B) 1/4
C) 1/3
D) 2/3
E) 1/2