**Core Concept**
The management of tuberculosis (TB) in lactating women involves balancing the risk of TB transmission to the infant with the benefits of breastfeeding. The World Health Organization (WHO) recommends that infants of mothers with TB can be safely breastfed if the mother is receiving effective antitubercular therapy (ATT).

**Why the Correct Answer is Right**
Withholding breastfeeding from a mother with active TB is not recommended, as it deprives the infant of essential nutrients and can lead to malnutrition. Moreover, the risk of TB transmission from mother to infant is not significantly reduced by withholding breastfeeding. In fact, the WHO recommends that infants of mothers with TB should be started on isoniazid (INH) prophylaxis at birth, regardless of whether they are breastfed or not. This is because INH can prevent the development of TB in the infant, even if they are exposed to the bacteria through breastfeeding.

**Why Each Wrong Option is Incorrect**
**Option A:** Administering INH to the baby is actually recommended by the WHO as a measure to prevent TB in infants of mothers with active TB.
**Option C:** Giving ATT to the mother for 2 years is in line with the standard treatment duration for pulmonary TB, which is typically 6 months, but can be extended to 2 years in some cases.
**Option D:** Asking the mother to ensure proper disposal of sputum is an essential measure to prevent the spread of TB to others.

**Clinical Pearl / High-Yield Fact**
TB can be safely transmitted from mother to infant through breastfeeding, but the risk is significantly reduced if the mother is receiving effective ATT. The key is to balance the benefits of breastfeeding with the need to prevent TB transmission, and INH prophylaxis can play a crucial role in this process.

✓ Correct Answer: B. Withhold breast feeding