एड्स नियंत्रण विभाग हा खालीलपैकी _________ मध्ये विलीन करण्यात आला असता तो राष्ट्रीय एड्स नियंत्रण संघटना (NACO) म्हणून ओळखला जातो.

Option B matches the question because the Department of AIDS Control merged into the Ministry of Health and Family Welfare and now operates as NACO—the National AIDS Control Organisation under the health ministry umbrella. Family Planning Association, leprosy, and TB programmes are parallel verticals, not NACO's parent merger. Distractors A (Family Planning Association of India), C (National Leprosy Eradication Programme), D (National TB Control Programme) look plausible but do not follow from the facts stated in the question. MPSC papers often recycle this type of detail, so read the question carefully before you commit to an option.