Which of the following is/are a bio fertiliser 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 and 3

B

Only 1

C

Only 1 and 2

D

Only 2