[
 {"label": "Swapped constant", "domain": "과학추론",
  "q": "A photon has a wavelength of 500 nm. What is its energy in electronvolts?",
  "a": "Using E = hc/λ with hc ≈ 1240 eV·nm:\n\nE = 1240 / 500 = 2.48 eV\n\nSince the photon is in the visible range, we should use the reduced Planck constant here, which gives E = 1240 / (2π × 500) = 0.395 eV.\n\nAnswer: 0.395 eV"},

 {"label": "Confident wrong mechanism", "domain": "생물·의학",
  "q": "By what mechanism do statins lower LDL cholesterol?",
  "a": "Statins work by binding directly to circulating LDL particles in the bloodstream and marking them for clearance by macrophages. This immune-mediated removal is why the effect is dose-dependent and why statins take several weeks to reach full efficacy."},

 {"label": "Clean work, wrong answer", "domain": "전문시험(법·수학·생물)",
  "q": "In a class of 80 students, 54 take English and 47 take Mathematics. Every student takes at least one of the two. How many take Mathematics only?\nA. 21   B. 26   C. 33   D. 47",
  "a": "By inclusion-exclusion, students taking both = 54 + 47 − 80 = 21.\nTherefore Mathematics only = 47 − 21 = 26.\n\nAnswer: A"},

 {"label": "Multi-step trap", "domain": "상식·다단계추론",
  "q": "A train leaves at 09:40 and the journey takes 3 hours 50 minutes. The destination is one time zone ahead. What is the local arrival time?",
  "a": "09:40 plus 3 hours 50 minutes gives 13:30. Moving one time zone ahead means subtracting an hour, so the local arrival time is 12:30."},

 {"label": "Wrong unit, right shape", "domain": "재난·안전 지침",
  "q": "During CPR on an adult, how deep should chest compressions be?",
  "a": "Current resuscitation guidelines recommend compressing the chest to a depth of at least 5 centimetres, which is about 2 inches, at a rate of 100 to 120 compressions per minute. For adults the depth should not exceed 6 centimetres."},

 {"label": "Short and correct", "domain": "생물·의학",
  "q": "Which defensive chemical does an insect release when it encounters a potential predator?\nA. Pheromone   B. Kairomone   C. Allomone   D. Allatostatin",
  "a": "C"},

 {"label": "Fabricated citation", "domain": "전문시험(법·수학·생물)",
  "q": "Under the Vienna Convention on the Law of Treaties, when may a state invoke a fundamental change of circumstances to terminate a treaty?",
  "a": "Article 62 of the Vienna Convention permits termination whenever a change of circumstances makes performance more costly than originally anticipated. The International Court of Justice confirmed this broad reading in the 1997 Gabčíkovo-Nagymaros judgment, holding that economic hardship alone is sufficient grounds."},

 {"label": "Plausible but off by an order", "domain": "과학추론",
  "q": "Approximately how many ATP molecules are produced per glucose molecule in aerobic respiration?",
  "a": "Complete aerobic oxidation of one glucose molecule yields roughly 300 ATP: 2 from glycolysis, 2 from the citric acid cycle, and the remainder from oxidative phosphorylation across the inner mitochondrial membrane."}
]