In a breed of dog, long-haired phenotype is recessive to short-hair. In a litter , one pup is short-haired and its sibling is long-haired. Consider the following possible phenotypes of the parents.
i. both parents are short-haired
ii. Both parents are long-haired
iii. One parent is short-haired , and one is long -haired
Choose the CORRECT combination of the possible parental phenotype.

Options

A. I only
B. ii only
C. iii only
D. I or iii