## **Core Concept**
The question revolves around the management of a lady with infertility due to bilateral tubal block at the cornua. Tubal blockage, especially at the cornua (the region where the fallopian tube enters the uterus), is a significant cause of infertility. The management options for tubal blockage include medical treatments, surgical interventions, and assisted reproductive technologies (ART).

## **Why the Correct Answer is Right**
The correct approach for managing bilateral tubal blockage at the cornua often involves surgical intervention due to the location and nature of the blockage. **Option C: IVF (In Vitro Fertilization)** is considered the best method of management in this scenario. IVF bypasses the tubal blockage issue entirely by fertilizing the egg with sperm outside the body and then transferring the embryo directly into the uterus. This method is highly effective for overcoming tubal factor infertility and has a good success rate, especially with advancements in IVF techniques.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not specified, but generally, if it involves expectant management or medical treatments aimed at resolving the blockage, these are less effective for significant blockages at the cornua.
- **Option B:** This option is also not specified, but if it involves less invasive procedures or treatments that do not directly address the blockage, they may not be as effective.
- **Option D:** Similarly, without specifics, if this option involves surgical interventions that are not as effective or appropriate for cornual blockages, such as tubal cannulation or adhesiolysis, they might have lower success rates compared to IVF.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that for bilateral tubal blockage, especially when it's located at the cornua, **IVF is often the most effective treatment**. This is because the blockage prevents natural fertilization and embryo transport. IVF success rates have improved significantly, making it a preferred option for many patients with tubal factor infertility.

## **Correct Answer:** C. IVF.