Dough kept overnight in warm weather becomes soft and spongy because of

Find the mismatched pair regarding fermentation.

Which gas is released during the process of fermentation that gives the puffy appearance to dough for making bread?

Which vitamin content is increased by Lactobacillus bacteria in milk?

Yeast is the source of

Choose the correct sentences.
$(i)$ Dosa and Idli are fermented by bacteria, not yeast.
$(ii)$ $Saccharomyces \text{ } cerevisiae$ is a yeast.
$(iii)$ $LAB$ (Lactic Acid Bacteria) increase the nutritional quality of milk by increasing vitamin $B_{12}$.
$(iv)$ Whisky and brandy are fermented beverages produced by distillation.