The correct arrangement of different voids of concrete according to their size is.
1
entrapped voids > entrained voids > capillary voids > gel voids
2
entrapped voids > entrained voids > gel voids > capillary voids
3
capillary voids > entrapped voids > entrained voids > gel voids
4
entrained voids > entrapped voids > capillary voids > gel voids