Read the following four statements (A-D):

 A. Colostrum is recommended for the new born because it is rich in antigens.

 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?

Colostrum is the first milk which is produced by the mother in course of lactation.

• It is a rich source of antibody. It boosts the immune system of the new born.
• Colostrum is rich in antibody G which is denoted as IgG.

Chikungunya is a mosquito-vector disease. 

• It is caused by the virus, Chikungunya virus (CHIKV).
• Principle of gram staining is strictly limited to bacteria.

Tissue culture is the used in obtaining virus free plants by adding the desired nutrients to the plant in in-vitro medium. 

Beer is manufactured by the distillation of wheat, barley and other cereals. They undergo fermentation and the starch is broken to produce simple sugar.