**Core Concept**
Vaginal delivery after previous Caesarean (VBAC) is a controversial topic in obstetrics. The decision to attempt VBAC depends on various factors, including the indication for the previous Caesarean, the presence of uterine scars, and the overall health of the mother. The American College of Obstetricians and Gynecologists (ACOG) provides guidelines for VBAC, which include contraindications to minimize the risk of complications.

**Why the Correct Answer is Right**
The correct answer is a contraindication to VBAC due to an increased risk of uterine rupture. A previous classical Caesarean incision, which involves a vertical incision in the upper segment of the uterus, is a significant contraindication for VBAC. This is because the classical incision is more likely to rupture during labor, leading to severe maternal and fetal morbidity.

**Why Each Wrong Option is Incorrect**
* **Option A:** A previous low-transverse Caesarean incision is generally considered a safe indication for VBAC, as it has a lower risk of uterine rupture compared to classical or vertical incisions.
* **Option B:** A previous Caesarean due to a non-reassuring fetal heart rate pattern is not a contraindication for VBAC. However, it may require closer monitoring during labor.
* **Option C:** A previous Caesarean with a uterine dehiscence (a partial rupture of the uterus) is a relative contraindication for VBAC, as it may increase the risk of uterine rupture during subsequent pregnancies.

**Clinical Pearl / High-Yield Fact**
When counseling patients about VBAC, it's essential to discuss the risks and benefits of attempting vaginal delivery after a previous Caesarean. A thorough review of the patient's medical and obstetric history, as well as a discussion of the potential risks of uterine rupture, is crucial in making an informed decision.

**Correct Answer:** C. A previous classical Caesarean incision is a significant contraindication for VBAC due to an increased risk of uterine rupture.