Choose the correct statements :
A. Humus gives soil its dark colour
B. Humic acid is insoluble in acidic solution
C. Fulvic acid is soluble in acidic solution
D. Humic acid has lower oxygen content compared to fulvic acid
E. Clay particles acts as colloid in water
Choose the most appropriate answer from the options given below:
1
A and E only
2
A, B and C only
3
A, B, C and D only
4
A, B, C, D and E