Assertion A: In the standing-wave flume, flow occurs in a super-critical state so that discharge can be related to a depth upstream of flow.

Reason R: A standing wave flume is a venturi flume operating under one condition in which a hydraulic jump is formed.

- 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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