Read the following four statements $(A -D)$ about certain mistakes in two of them :
$(A)$ 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 hole in 'Swiss cheese' are due to production of large amount of methane by Propionibacterium
sharmanii
$(D)$ In our stomach, lactic acid bacteria play very beneficial role in checking disease – causing microbes
Which are the two statements having mistakes ?

During its formation, bread becomes porous due to release of Carbon dioxide by the action of

The large holes in swiss cheese are due to production of a large amount of …$A$… by a bacterium …$B$…. Here $A$ and $B$ refers to

Why does 'Swiss cheese' have big holes ?

Streptococcus thermophilus and Lactobacillus bulgaricus are being used for the production of