Maithili is the answer that matches the Bihar-specific fact asked in the question. inant language of the Mithila region. The key to this question is the precise association expressed in its wording: “Which literary language is predominantly spoken in the Mithila region of Bihar?” The answer Maithili matches that clue directly and is therefore factually appropriate. Option A — Magahi — 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 B — Bhojpuri — is incorrect because it does not match the exact person, district, location, institution, river, event or identifying feature required by the question. Option D — Angika — 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. Maithili is the dominant language of the Mithila region. 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 Magahi, Bhojpuri.