Neurospora Loci D and F Are Located on the Same $\times$

Multiple Choice

Neurospora loci d and f are located on the same chromosome.The d locus always segregates at M_I,while the e locus segregates at M_II at a frequency of 10%.Assuming complete interference,the expected frequency of parental ditypes in the progeny of a cross d⁺e⁺ $\times$ d e is:

A) 30%.
B) 40%.
C) 45%.
D) 80%.
E) 90%.