The presence of entrained air in concrete results in

i) reducing bleeding

ii) lowering density of concrete

iii) decreasing strength at all ages

The correct answer is

- 1
  
  (i) and (ii)
- 2
  
  (ii) and (iii)
- 3
  
  (i) and (iii)
- 4
  
  (i), (ii) and (iii)

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