MCQ
How Rhizobium helps in nitrogen fixation?
- AFound in nodules of leguminous plants.
- BIt converts atmospheric nitrogen into ammonia.
- CHas a symbiotic association with leguminous plants.
- DAll of the above
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| Column-I | Column-II |
| $(A)$ Barrier | $(1)$ Copper$-T$ |
| $(B)$ $IUD$ | $(2)$ Vasectomy and tubectomy |
| $(C)$ Surgical technique | $(3)$ Condoms cervical Caps |
| $(D)$ Adminisitrating hormones | $(4)$ Oral, pill and saheli |