Read the following statements.
Statement I: Majority of the bacteria are important decomposers.
Statement II: Cyanobacteria is a photoautotroph, nitrifying bacteria is a chemoautotroph and Lacto bacillus is a chemoheterotroph.
In light of the given statements, choose the correct answer from the options given below.

Bacteria exhibit high diversity in terms of metabolism when compared to any other group of living organisms. Different modes of nutrition are observed however most of the bacteria exhibit chemoheterotrophic mode of nutrition.

Photoautotrophic - Cyanobacteria

Chemoautotrophic - Nitrifying bacteria etc

Chemoheterotrophs - Pathogenic bacteria ,curd forming bacteria etc