Refer to the given figure and select the correct option.

Options

A. a) `{:(P,Q,R),("Soil particles","root hairs","bacteria"):}`
B. b) `{:(P,Q,R),("Bacteria","Hook","Soil particle"):}`
C. c) `{:(P,Q,R),("Nodule","Infection thread","Bacteria"):}`
D. d) `{:(P,Q,R),("Bacteria","Infection thread","Root hair"):}`

Answer

A