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An Intiative by Sri Chaitanya
a
A - iii, B - i, C - iv, D - ii
b
A - iii, B - ii, C - iv, D - i
c
A - ii, B - iii, C - iv, D - i
d
A - i, B - ii, C - iv, D - iii
answer is C.
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Ladybird is a beetle which helps in getting rid of Aphids, Dragonflies control Mosquitoes, Bacillus thuringiensis is a bacterium controls butterfly caterpillars and Trichoderma controls soil plant pathogens