Traditional drinks like toddy are obtained from which plant?

Which of the following are the main benefits of $LAB$?
$I.$ Increase vitamin-$B_{12}$ amount,thus increasing nutrient quality of milk.
$II.$ Checks disease-causing microbes in the stomach.
Choose the correct option.

$LAB$ (Lactic Acid Bacteria) are used to curdle milk by producing:

What is the full form of $LAB$?

The starter or inoculum is added to fresh milk in order to convert milk into curd. The term starter or inoculum here refers to:

The puffed-up appearance of dough is due to fermentation by bacteria. Identify the gas liberated during the process.