Pick up the correct statement from the following :

• The ratio of total volume of voids in soil aggregates to the total volume of aggregate, is called Porosity
• Water retained by the interstices due to molecular attraction, is called pellicular water
• The ratio of volume of water obtained by gravity drainage to the total volume of the materials drained, is called 'yield'
• Sum of the percentage of specific yield and specific retention is 100
• All the above.