Painless lower GI bleed is seen in child with -a) Meckle’ s diverticulumb) Rectal polypc) Anal fissured) Ac. appendicitis

**Core Concept**
Meckel's diverticulum is a congenital anomaly of the small intestine characterized by the presence of a small, bulging pouch on the wall of the ileum, typically resulting from the incomplete closure of the vitelline duct. This condition can lead to gastrointestinal bleeding due to the presence of ectopic gastric or pancreatic tissue within the diverticulum.

**Why the Correct Answer is Right**
The correct answer is A) Meckel's diverticulum. The bleeding in Meckel's diverticulum is usually painless and is caused by the presence of ectopic gastric mucosa within the diverticulum, which secretes acid and leads to ulceration and bleeding. This type of bleeding is often seen in children and can be life-threatening if not promptly treated. The bleeding is typically from the ectopic gastric mucosa, which is the source of acid production and subsequent ulceration.

**Why Each Wrong Option is Incorrect**
**Option B:** Rectal polyps can cause bleeding, but it is often painless and can be seen in adults as well. The bleeding is usually due to the erosion of the polyp into the rectal mucosa.
**Option C:** Anal fissures typically cause severe pain during defecation and are not associated with painless lower GI bleeding.
**Option D:** Acute appendicitis can cause abdominal pain and tenderness, but it is not typically associated with painless lower GI bleeding.

**Clinical Pearl / High-Yield Fact**
Meckel's diverticulum is a common cause of painless lower GI bleeding in children, and its presence should be considered in patients with a history of recurrent GI bleeding.

**Correct Answer:** A. Meckel's diverticulum.