Which of the following is mismatched?

Antibiotics are mostly identified from which of the following?

Which of the following is essential to avoid environmental pollution?

Which of the following pairs is incorrect?

Which one of the following pairs is wrongly matched?

Read the following four statements $(A - D)$ and identify the two statements that contain mistakes:
$(A)$ Dough,which is used for making foods such as dosa and idli,is fermented by fungi and algae.
$(B)$ Toddy,a traditional drink of southern India,is made by fermenting sap from palms.
$(C)$ Large holes in 'Swiss cheese' are due to the production of a large amount of methane by $Propionibacterium$ $sharmanii$.
$(D)$ In our stomach,lactic acid bacteria play a very beneficial role in checking disease-causing microbes.
Which are the two statements having mistakes?