**Core Concept**
The management of locally advanced cervical cancer (Ca cervix) involves a multidisciplinary approach, combining treatments to maximize tumor control and minimize side effects. In FIGO stage 2-3 cervical cancer, the primary goal is to control the tumor locally while addressing potential micrometastatic disease.

**Why the Correct Answer is Right**
For locally advanced cervical cancer, radiotherapy plays a crucial role in eradicating the primary tumor and reducing the risk of local recurrence. Concurrent chemotherapy is administered to enhance the radiosensitivity of cancer cells, improve tumor response, and address potential micrometastatic disease. The combination of radiotherapy and chemotherapy has been shown to improve overall survival and reduce the risk of recurrence compared to radiotherapy alone.

**Option A:** Surgery plus chemotherapy is not the standard approach for locally advanced cervical cancer, as surgery may not be feasible or effective in eradicating the tumor in this stage.

**Option C:** Chemotherapy alone is insufficient for locally advanced cervical cancer, as it may not adequately control the primary tumor or address potential micrometastatic disease.

**Option D:** Radiotherapy plus HPV vaccine is not a standard treatment for cervical cancer, as the vaccine is primarily used for prevention in individuals who have not been previously exposed to HPV.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the management of cervical cancer is highly individualized and may involve a combination of treatments, including surgery, radiotherapy, chemotherapy, and immunotherapy. Patients with locally advanced cervical cancer should be referred to a multidisciplinary team for comprehensive evaluation and treatment planning.

**✓ Correct Answer: B. Radiotherapy plus chemotherapy.**