Okay, let's tackle this question about ileal atresia and the apple peel bowel with loss of dorsal mesentery. I need to recall the different types of ileal atresia and their characteristics.

First, I remember that ileal atresia is a congenital condition where the ileum is not present or is blocked. There are different types based on the embryological development. The apple peel appearance is a term I've heard before, maybe in the context of a specific type.

The question mentions the loss of dorsal mesentery. The mesentery is the structure that attaches the intestines to the posterior abdominal wall. The dorsal mesentery is part of the embryonic development. If there's a loss of this, it might be related to a certain type of atresia.

I think ileal atresia is classified into four types: Type I is a web or membrane causing obstruction without atresia. Type II has a short segment with a fibrous cord. Type III is divided into IIIa and IIIb. Type IIIa is where the atresia is close together, and IIIb is when there's a long gap, which might be called a "apple peel" appearance because the bowel looks like it's peeled back. Also, Type IIIb is associated with loss of the dorsal mesentery because of the embryological development involving the midgut.

So, the apple peel bowel is a feature of Type IIIb ileal atresia, which is also called the "apple peel" or "cut apple" appearance. This happens because the atresia is at a distance from the mesenteric attachment, leading to a long segment of atresia and the loss of the dorsal mesentery.

The other types: Type I and II don't have the apple peel appearance. Type IIIa has the atresia close together, so the mesentery might still be present. Therefore, the correct answer should be Type IIIb. The options given here are likely labeled as C or D, but since the user hasn't provided the options, I need to check if the standard classification supports this. Yes, in standard textbooks, Type IIIb is the one with the apple peel appearance and loss of dorsal mesentery.

So the answer should be Type IIIb, which is typically option C or D depending on the exam's setup. Since the correct answer is supposed to be labeled here, but the options are missing, I'll proceed with the reasoning that Type IIIb is the correct answer.

**Core Concept**
Ileal atresia is classified into four types based on embryologic origin. Type IIIb (apple peel atresia) involves a long gap with loss of dorsal mesentery due to incomplete rotation and fixation of the midgut during development.

**Why the Correct Answer is Right**
Type IIIb ileal atresia occurs when the ileal segment is atretic and retracted, creating a "cut apple" or "apple peel" appearance. The loss of dorsal mesentery is due to failure of the midgut to fixate properly during embryogenesis, leading to a long gap between the atretic segments. This is distinct from Type IIIa, where the gap is shorter and mesentery is preserved.

**Why Each Wrong Option is Incorrect**
**Option A:** Type

✓ Correct Answer: C. Type 3