A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children ($2$ daughters and $5$ sons). Three of the sons suffer from the given disease but none of the daughters are affected which of the following mode of inheritance do you suggest for this disease

• A

  Autosomal dominant

• B

  Sex-linked dominant

• C

  Sex-limited recessive

• D

  Sex-linked recessive