**Core Concept**
The question is testing the understanding of bone grafting procedures, specifically the use of fresh autogenous iliac crest transplant in managing infra bony pockets. This involves **orthopedic** and **periodontal** principles, focusing on the **healing process** of bone defects.

**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss a common side effect of this procedure. One of the most likely side effects of fresh autogenous iliac crest transplant is **donor site morbidity**, which includes pain, infection, and nerve damage at the site of bone harvest. The **iliac crest** is a common donor site due to its accessibility and the abundance of **cancellous bone**.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific answer choice, it's challenging to provide a detailed explanation. However, if it's related to the bone graft itself, it might be incorrect due to the lack of direct relation to common side effects.
**Option B:** Similarly, without the specific text, it's hard to comment, but if it's related to the recipient site, it might be less likely compared to donor site issues.
**Option C:** This could potentially be related to the surgical procedure, but without the text, it's speculative.
**Option D:** Again, without the specific option, it's difficult to assess its accuracy in relation to the question.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that **autogenous bone grafts** have the highest success rate due to their **osteoconductive**, **osteoinductive**, and **osteogenic** properties, but they also come with the risk of **donor site complications**. This balance is crucial in managing infra bony pockets.

**Correct Answer:** Not provided in the query.