Question

Which one of the following helps in absorption of phosphorus from soil by plants
or
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition
A. Aspergillus
B. Glomus
C. Trichoderma
D. Azotobacter

Answer 1

Correct Answer - 2
Trichoderma sp are free- living fungi .Nucleopolyhedroviruses mainly attack insects and pathogens. Bt- cotton also seems to be a correct choice , but since the past is not mentioned in the choice, this is probably not the best choice.Ladybrids are used to control aphids, but they are not microbes .