Assertion A: Water flows through a pipe connecting two reservoirs. The line joining the water surface levels in the reservoirs is the hydraulic gradient.

Reason R: There will be no negative gauge pressure anywhere in the pipeline, as long as the pipeline lies below the hydraulic gradient.

- 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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