**Core Concept**
The Revised National Tuberculosis Programme (RNTCP) is based on the Directly Observed Treatment, Short-course (DOTS) strategy, which is a **tuberculosis control** method. This approach aims to reduce the incidence and prevalence of **tuberculosis** in a given population. The **RNTCP** incorporates various strategies for effective **tuberculosis** control.

**Why the Correct Answer is Right**
The correct answer is related to the **DOTS** approach, which is a key component of the **RNTCP**. **DOTS** involves directly observing patients while they take their medication, ensuring adherence to the treatment regimen. This approach has been shown to be effective in reducing **tuberculosis** transmission and improving treatment outcomes. The **RNTCP** also involves **active case finding** and treatment of all forms of **tuberculosis**, not just smear-positive cases.

**Why Each Wrong Option is Incorrect**
**Option C:** This option is incorrect because treatment is not limited to smear-positive cases; all forms of **tuberculosis** are treated under the **RNTCP**.
**Option D:** This option is incorrect because **general practitioners** are not restricted from providing treatment under the **RNTCP**.

**Clinical Pearl / High-Yield Fact**
A key aspect of the **RNTCP** is the use of **DOTS**, which has been shown to improve treatment adherence and outcomes in **tuberculosis** patients. The **RNTCP** has been effective in reducing **tuberculosis** incidence and prevalence in various regions.

**Correct Answer:** D. b, e