Read the following four statements (A-D)
(A) Both, photophosphorylation and oxidative phoshorylation involve up hill transport of protons across the membrane
(B) In dicot stems, a new cambium origanets from the cell of pericycle at trhe time of secondary growth
(C ) Stamens in flowers of Gloriosa and Petunia are polyandrous
(D) Symbiotic nitrogen-fixers occur in the free-living state also in soil
How many of the above statements are right

Options

A. i) Four
B. ii) One
C. iii) Two
D. iv) Three

Answer

D