Which of the following statements is incorrect?

- 1
  
  Minimum cross-sectional area of longitudinal reinforcement in a column is 0.8%to
- 2
  
  Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm
- 3
  
  Reinforcing bars in a column should not be less than 12 mm in diameter.
- 4
  
  The number of longitudinal bars provided in a circular column should not be less than four.

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