Purnia is the answer that matches the Bihar-specific fact asked in the question. n is known for tobacco cultivation. The key to this question is the precise association expressed in its wording: “Which district is known for producing high-quality tobacco in Bihar?” The answer Purnia matches that clue directly and is therefore factually appropriate. Option A — Katihar — is incorrect because it does not match the exact person, district, location, institution, river, event or identifying feature required by the question. It may be associated with another Bihar-related context, but that broader association does not satisfy this specific wording. Option C — Samastipur — is incorrect because it does not match the exact person, district, location, institution, river, event or identifying feature required by the question. Option D — Vaishali — is incorrect because it does not match the exact person, district, location, institution, river, event or identifying feature required by the question. Bihar GK questions frequently place neighbouring districts, related historical personalities, nearby rivers or institutions from the same field among the options. Purnia region is known for tobacco cultivation. Bihar GK questions frequently place neighbouring districts, rivers, historical centres, personalities or government institutions together as distractors, so recognition of a familiar name alone is insufficient. The alternatives Katihar, Samastipur, Vaishali may be valid.
