**Core Concept**
The best mode to control leprosy eradication-programme involves a multi-faceted approach that includes early detection, prompt treatment, and community-based interventions. This strategy is grounded in the principles of public health and disease control, with the ultimate goal of eliminating leprosy as a public health problem.

**Why the Correct Answer is Right**
The World Health Organization (WHO) recommends the Multi-Drug Therapy (MDT) regimen for the treatment of leprosy, which consists of rifampicin, dapsone, and clofazimine. This combination therapy is highly effective in curing the disease and preventing its transmission. The MDT regimen is administered for a period of 6-12 months, depending on the severity of the disease and the patient's response to treatment. Early detection and prompt treatment are critical in preventing the progression of leprosy to its more severe forms, such as lepromatous leprosy.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a well-defined treatment approach for leprosy eradication-programme.
**Option B:** This option is incorrect because it does not take into account the importance of community-based interventions in leprosy control.
**Option C:** This option is incorrect because it does not mention the use of MDT, which is the recommended treatment regimen for leprosy.

**Clinical Pearl / High-Yield Fact**
It's essential to note that leprosy can be prevented through early detection and treatment, as well as through the implementation of community-based interventions, such as health education and contact tracing.

**Correct Answer: C. MDT regimen.**