Identify the correct statement
i. Sulphur is essential for amino acids Cystine and Methionine.
ii. Low level of N, K, S and Mo affect the cell division.
iii. Non-leguminous plant Alnuswhich contain bacterium Frankia.
iv. Denitrification carried out by nitrosomonas and nitrobacter.
I, II are correct
I, II, III are correct
I only correct
all are correct