Consider the following statements:
The addition of surfactants in the concrete mix results in:
1. increase in the water-cement ratio
2. decrease in the water-cement ratio
3. increase in the strength of concrete
4. decrease in the curing duration
5. increase in the density of concrete
Which one of the following statements is correct?
1
3, 4 and 5 only
2
2, 3 and 5 only
3
1, 3 and 4 only
4
1, 4 and 5 only