A major triad is formed by stacking
• a major third on top of a minor third.
• a major third on top of a major third.
• a minor third on top of a minor third.
• a minor third on top of a major third.
• a major third on top of a minor third.
• a major third on top of a major third.
• a minor third on top of a minor third.
• a minor third on top of a major third.