What is produced by $LAB$ during the process of curd formation?

The bacteria that increase the nutritional quality of milk by increasing vitamin $B_{12}$ are known as .......... .

Bacteria cannot be seen with the naked eyes,but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope,which sample would you carry and why?

What is the beneficial role of $LAB$ in our stomach?

How many of the following statements are correct regarding the process of converting milk into curd?
$I -$ The bacteria responsible for this process are $LAB$.
$II -$ $LAB$ produces acids that coagulate the milk.
$III -$ The protein present in milk is partially digested.
$IV -$ It increases the nutritional quality by increasing the amount of Vitamin $B_{12}$.

Toddy,a traditional drink,is made by fermentation from: