Fulvic acid molecules in soil humus are
(a) Randomly coiled
(b) More polar
(c) Highly charged
(d) Smaller molecules than humic acid molecules
Choose the correct option :
1
(a), (b) and (c) only
2
(b), (c) and (d) only
3
(a), (c) and (d) only
4
(b) and (d) only