Question

Sequence the principal stages of biological nitrogen fixation in their correct order of occurence- (

  • A . Formation of infection thread (
  • B . Rhizobium multiply to colonise. (
  • C . Curling of root hair (
  • D . Differentiation of cortical cells into nitrogen fixing cells Choose the correct answer from the options given below.
A (B), (C), (A), (D)
B (A), (B), (C), (D)
C (B), (A), (D), (C)
D (C), (B) (D), (A)
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