**Core Concept**
The Revised National Tuberculosis Control Programme (RNTCP) in India categorizes patients into different categories based on their treatment needs, including Category-1 (Cat-1) for new sputum smear-positive patients. The treatment regimen for Cat-1 patients involves a specific combination of anti-tuberculosis drugs.

**Why the Correct Answer is Right**
As per RNTCP guidelines, Cat-1 patients receive an intensive phase of treatment for 2 months, which includes 4 first-line anti-tuberculosis drugs: Isoniazid (H), Rifampicin (R), Ethambutol (E), and Pyrazinamide (Z). Following the intensive phase, a continuation phase of treatment is given for 4 months, which includes 2 drugs: Isoniazid (H) and Rifampicin (R). This regimen helps to effectively treat the infection while minimizing the development of drug resistance.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option incorrectly states that patients receive 4 drugs for 2 months and 2 drugs for 4 months. While patients do receive 4 drugs initially, this is only for 2 months, not the entire duration.
* **Option B:** This option is incorrect as it suggests that patients receive 3 drugs for 2 months and 2 drugs for 4 months. The correct regimen includes 4 drugs for the initial 2 months.
* **Option C:** This option is incorrect as it implies that Cat-1 patients include retreatment cases, which is not accurate. Retreatment cases are categorized separately under RNTCP guidelines.
* **Option D:** This option is incorrect as it states that the treatment is given daily, which is not the standard regimen for Cat-1 patients. The intensive phase is given once a week, and the continuation phase is given once a fortnight.

**Clinical Pearl / High-Yield Fact**
It is essential to note that the treatment regimen for Cat-1 patients is based on the patient's ability to complete the full course of treatment, as incomplete treatment can lead to the development of drug-resistant TB.

**Correct Answer: B. 3 drugs for two months and 2 drugs for four months.