Read the following statement regarding the mineral
(i) Both Rhiqobium and Frankia are free living in soil, but as symbionts, can fix atmospheric nitrogen.
(ii) Ammonia synthesis by nitrogenase requires 16 ATP for each ammonia produced.
(iii) While most of plants can assimilate nitrate as well as ammonium ions, the latter is quite toxic to plnats and hence cannot accumulate in them.
(iv) Along with the transpiration stream, the nodules of some plants export the fixed nitrogen as urides.
Which of these are correct
A. (i), (iii) & (iv)
B. (ii), (iii) & (iv)
C. (iii) & (iv)
D. All are correct
