**Core Concept**
The treatment of pulmonary tuberculosis (TB) during pregnancy requires careful consideration to ensure the health of both the mother and the fetus. **Tuberculosis** is a bacterial infection caused by **Mycobacterium tuberculosis**, and its treatment involves the use of **antitubercular drugs**.

**Why the Correct Answer is Right**
The treatment of choice for sputum positive pulmonary TB in pregnant women, especially during the first trimester, involves the use of **isoniazid**, **rifampicin**, and **ethambutol**, as these drugs are considered safe for use during pregnancy.

**Why Each Wrong Option is Incorrect**
**Option A:** Not provided, so cannot be assessed.
**Option B:** Not provided, so cannot be assessed.
**Option C:** Not provided, so cannot be assessed.
**Option D:** Not provided, so cannot be assessed.

**Clinical Pearl / High-Yield Fact**
It's crucial to initiate **antitubercular therapy** as soon as possible to prevent the progression of TB and reduce the risk of transmission to the fetus.

**Correct Answer:** D. Category I anti-TB drugs (Isoniazid, Rifampicin, Ethambutol).