Question

Which of the following is/are a biofertilizer used to add, conserve and stimulate phosphorus as a plant nutrient in the soil? 1. Azospirillum 2. Mycorrhizal fungi 3. Azotobacter Select the correct answer using the codes given below.

A Only 2
B Only 2 and 3
C Only 1 and 2
D Only 1
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