Which of the following is responsible for the conversion of milk into curd?

Study the following flow chart that shows curd formation from milk and select the correct option for $A$ and $B$.
Milk is incubated with curd
$\downarrow$
$LAB$ shows growth in milk
$\downarrow$
Production of .....$A$.....
$\downarrow$
Coagulation and digestion of milk protein
$\downarrow$
Improved nutritional quality by increased ....$B$....

The dough used for making dosa and idli is fermented by which organisms,and what causes it to appear puffed up?

Which of the following are fermented food products derived from soybean?

Microorganisms such as $Lactobacillus$ are commonly called:

Which microorganisms are used in the production of curd?