**Core Concept**
In cases of bilateral tubal blockage at the cornua, the primary concern is the inability to conceive due to the obstruction of the fallopian tubes, which are essential for fertilization and embryo transport. The most effective method of management in such cases is to bypass the blocked tubes and directly achieve fertilization through an assisted reproductive technology.

**Why the Correct Answer is Right**
IVF (In Vitro Fertilization) is the best method of management for a lady with infertility due to bilateral tubal blockage at the cornua. This is because IVF involves the collection of eggs from the ovaries, fertilization of the eggs with sperm outside the body, and subsequent transfer of the embryo into the uterus. This bypasses the blocked tubes, allowing fertilization to occur despite the tubal blockage. IVF has a high success rate in such cases, making it the preferred treatment option.

**Why Each Wrong Option is Incorrect**
**Option A:** Laparoscopy and hysteroscopy are diagnostic tools that can help identify the location and extent of the tubal blockage. However, they are not treatment options for bilateral tubal blockage.

**Option B:** Hydrotubation involves flushing the fallopian tubes with a liquid to check for blockages. While it can be used as a diagnostic tool, it is not a treatment option for bilateral tubal blockage.

**Option D:** Tuboplasty is a surgical procedure that aims to repair or remove blockages in the fallopian tubes. However, its success rate is lower compared to IVF, especially in cases of bilateral tubal blockage at the cornua.

**Clinical Pearl / High-Yield Fact**
In cases of tubal blockage, it's essential to evaluate the extent and location of the blockage before deciding on a treatment plan. IVF is often the preferred treatment option for bilateral tubal blockage at the cornua due to its high success rate.

**Correct Answer Line**
✓ Correct Answer: C. IVF