Gardener's syndrome is a rare hereditary disorder involving the colon,which is characterized by:

• A. Polyposis in jejunum,pituitary adenoma and skin tomours.
• B. Polyposis colon,cancer thyroid,skin tumours.
• C. Polyposis of gastrointestinal tract,cholangiocarcinoma and skin tumours.
• D. Polyposis colon,osteomas,epidermal inclusion cysts and fibrous tumours in the skin.