Arrange the principle stages in nodule formation in a leguminous plant in a correct sequence.

• A

  Curling of root-hairs$\to$ Rhizobia multiply and colonise the surroundings of roots $\to$ Infection thread is produced$\to$Bacteria is carried into the cortex of the root $\to$ Nodule formation initiate in the cortex of the root 

• B

  Rhizobia multiply and colonise the surroundings of roots$\to$ Curling of root-hairs $\to$ Infection thread is produced$\to$Nodule formation initiate in the cortex of the root$\to$ Bacteria is carried into the cortex of the root

• C

  Rhizobia multiply and colonise the surroundings of roots$\to$  Infection thread is produced$\to$Curling of root-hairs $\to$Bacteria is carried into the cortex of the root $\to$ Nodule formation initiate in the cortex of the root 

• D

  Rhizobia multiply and colonise the surroundings of roots$\to$ Curling of root-hairs $\to$ Infection thread is produced$\to$Bacteria is carried into the cortex of the root $\to$ Nodule formation initiate in the cortex of the root