Which of the following statements are correct?

(i) Microbes are diverse- protozoa, bacteria, fungi and microscopic plant viruses, viroids and also prions that are proteinaceous infectious agents.

(ii) Microbes like bacteria and many fungi can be grown on nutritive media to form colonies, which cannot be seen by the naked eyes.

(iii) During growth, the LAB produce acids that coagulate and partially digest the milk protein.

(iv) A small amount to curd added to the fresh milk as inoculum or starter contain millions of lactic acid bacteria (LAB), which converting milk to curd.

(v) Lactic acid bacteria (LAB) also improves its nutritional quality of curd by increasing vitamin B 2 .

(vi) In our stomach too, the LAB play very beneficial role in checking disease causing microbes.