Answer:
a. Peptic ulcer
Explanation :
As the patient is presenting with nocturnal abdominal pains alongwith blood in the stools , it strongly suggests that he is suffering from peptic ulcer disease.
Dull or aching pain is most common symptom; classic complaint of epigastric pain relieved by eating is not typical in pediatric population... sx often persist for several years before dx
Almost 50% of patients suffering from peptic ulcer disease also have melena ( hemoptysis )
Dx made with endoscopy