A newborn baby presented with profuse bleeding from the umbilical stump after bih. Other physical examination are normal. PT and APTT are within normal limits. What is the most probable diagnosis you would consider?

**Core Concept**
The question tests the knowledge of a specific congenital bleeding disorder characterized by a deficiency of a critical coagulation factor. This disorder presents with bleeding from the umbilical stump, despite normal PT and APTT, due to the specific mechanism of the disease.

**Why the Correct Answer is Right**
The most probable diagnosis in this case is Vitamin K-dependent clotting factor deficiency, specifically Prothrombin Complex Deficiency (PCD), which includes deficiencies of Factors II, VII, IX, and X. These factors are synthesized in the liver and are essential for the coagulation cascade. The bleeding from the umbilical stump is a classic presentation of this condition. The normal PT and APTT are due to the fact that these factors are produced in a complex pathway, and deficiencies in individual factors may not affect the overall PT or APTT.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** This option is not provided.
* **Option C:** This option is not provided.
* **Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that Vitamin K-dependent clotting factor deficiencies, including PCD, are often associated with maternal anticoagulation therapy during pregnancy, which can lead to fetal bleeding complications.

**Correct Answer:** D.

✓ Correct Answer: A. Factor X deficiency