Assertion A: The discharge (Q) through a triangular weir is given by $Q = \frac{8}{15} C_{d} \sqrt{2 g} h^{5 / 2} \tan (\frac{θ}{2})$ where $C_{d}$ is the coefficient of discharge, h is the head of flow, $θ$ is the apex angle of the weir and g is the acceleration due to gravity.

Reason R: The cross-secti

- 1
  
  Both A and R are true and R is the correct explanation of A
- 2
  
  Both A and R are true but R is not a correct explanation of A
- 3
  
  A is true but R is false
- 4
  
  A is false but R is true

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