Softening point of bitumen to be used for road construction at a place where maximum temperature is $40^{0}$ C should be -

- 1
  
  less than $40^{0}$ C
- 2
  
  greater than $40^{0}$ C
- 3
  
  equal to $40^{0}$ C
- 4
  
  none of the above.

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