Lactobacillus comes under which category-(1) saprophytic(2) symbiotic(3) parasitic(4) none of these

You would be knowing that in our gastrointestine there lives billion of bacteria whhich are known as gut microflora. One of the type is lactobacilli which is a type of lactic acid bacteria that exists in the gastrointestinal tract and is symbiotic in that they help inhibit the growth of harmful bacteria by providing competition to harmful bacteria for space.

In return they absorb digested nutrients from us.So ans is 2)