Which of the following kinds of organism is / are known as decomposer organism/organisms?

With reference to the food chains in ecosystems, which of the following kinds of organism is / are known as decomposer organism/organisms?

1. Virus

2. Fungi

3. Bacteria

Select the correct answer using the codes given below.(2013)

a) 1 only

b) 2 and 3 only

c) 1 and 3 only

d) 1, 2 and 3

Answer: B

Viruses are a type of parasites and cannot survive without hosts.