Consider the following four statements (i)-(iv) and select the .option which includes all the correct ones only. (i) Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc. (ii) Body weight wise, the micro-organism Methylophilus methylotrophus may be able to produce several times more proteins than the cows per day. (iii) Common button mushrooms are a very rich source of vitamin C. (iv) A rice variety has been developed which is very rich in calcium.

• A. (iii) and (iv)                               
• B. (i), (iii) and (iv)
• C. (ii), (iii) and (iv)
• D.                    (i) and (ii)