$A$ - The puffed-up appearance of dough is due to the production of $CO_2$ gas.
$R$ - $LAB$ damages the stomach.

Microbes are used in:
$1.$ Primary treatment of sewage
$2.$ Secondary treatment of sewage
$3.$ Anaerobic sludge digester
$4.$ Production of bioactive molecules

Which one of the following pairs is wrongly matched?

Which of the following statements are associated with silage?
$(i)$ Prepared with the help of $Propionibacterium$ $sharmanii$.
$(ii)$ Used in the preparation of bread.
$(iii)$ It is a type of cattle feed.
$(iv)$ Used for the production of ethanol.
$(v)$ Produced by the fermentation of carbohydrates present in green plant tissues.

Match the following columns:

List-$I$	List-$II$
$(a)$ Bacteria	$(1)$ Saccharomyces cerevisiae
$(b)$ Mucor	$(2)$ $Bt$ cotton
$(c)$ Yeast	$(3)$ Penicillium notatum
$(d)$ Transgenic organism	$(4)$ Lactobacillus

Read the following four statements $(A-D)$.
$(A)$ Colostrum is recommended for the new born because it is rich in antibodies.
$(B)$ Chikungunya is caused by a Gram-negative bacterium.
$(C)$ Tissue culture has proved useful in obtaining virus-free plants.
$(D)$ Beer is manufactured by distillation of fermented grape juice.
How many of the above statements are wrong?