Streptococcus is employed in the manufacturing of

The starter of inoculum is added to the fresh milk in order to convert milk into curd, the term starter or inoculum here refer to

Which role is played by Lactobacillus in our stomach?

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 ?