This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Medicine
An 18-year-old woman was diagnosed 7 years earlier with precocious pseudopuberty secondary to ovarian tumor. Physical examination reveals oral and lingual dark pigmentation. (See Figure below). Which of the following is the most likely diagnosis? 
Select and explain. 
A. Peutz-Jegher syndrome, B. Gardner syndrome, C. Lynch syndrome, D. juvenile polyposis
A: Peutz-Jegher syndrome
Answer: A: Peutz-Jegher syndrome 
Explanation: Intestinal polyposis is a possible indication of Peutz-Jegher syndrome associated with dark brown spots on the lips and palate. There is characteristic distribution of pigment around lips, nose, eyes, and hands. Tumors of the ovary, breast, pancreas, and endometrium are associated with this syndrome. The other syndromes listed do not have the characteristic pigment changes described in this patient.