What is the capital of Bulgaria?

Answer options

• Correct: Sofia
  "Sofia" - target profile F1: Sofia: The source evidence is summarized conservatively. F2: This question targets Sofia; Sofia is the comparison option. F3: Sofia remains correct for the required answer. F4: Sofia remains the capital assigned to Bulgaria in this factual comparison.
• Option: Oslo
  "Oslo" - comparison profile F1: Oslo: The source evidence is summarized conservatively. F2: This question targets Sofia; Oslo is the comparison option. F3: Oslo remains wrong for the required answer. F4: Oslo remains the capital of Norway, so it misses the capital of Bulgaria.
• Option: Ankara
  "Ankara" - comparison profile F1: Ankara: The source evidence is summarized conservatively. F2: This question targets Sofia; Ankara is the comparison option. F3: Ankara remains wrong for the required answer. F4: Ankara remains the capital of Turkey, so it misses the capital of Bulgaria.
• Option: Athens
  "Athens" - comparison profile F1: Athens: The source evidence is summarized conservatively. F2: This question targets Sofia; Athens is the comparison option. F3: Athens remains wrong for the required answer. F4: Athens remains the capital of Greece, so it misses the capital of Bulgaria.

Solution

Sofia

"Sofia" is the capital of Bulgaria. Source: OpenStreetMap. "Sofia" remains the validated target for this prompt while the alternatives fail the same criterion. Source: OpenStreetMap. As of: 2026-02-13. Sofia remains the required target mapping in this prompt, and source-backed comparison with the other options confirms this assignment. Source: Wikidata.

Fun fact

Sofia remains the anchor answer for Geografie in this question family. Topic tie-in: Geografie focus Kontinente keeps the rule transferable to similar prompts and deterministic reruns. Sofia shapes national coordination as the seat of government in Bulgaria and separates Sofia from close distractors in later sessions. Sofia anchors the transfer across related prompts.