Biofertilizers are:
AFertilizer: Manure: any substance applied to soil fertility and increase plant growth and yield, these may be organic in organic or of bio-origin
BOrganic fertilizers: prepared from plant residues (cotton seedcake, groundnut cake etc.)
CNone of these
DBoth (a) & (b)
Correct answer
D. Both (a) & (b)
Explanation
The correct answer is Both (a) & (b).