The main Constituent of Biogas is__________?

A. Methane
B. Hydrogyn
C. Oxygen
D. Carbin dioxide

Lock Jaw i.e. difficulty in opening the mouth, is a symptom of___________?

A. Chlorea
B. Plague
C. Diphtheira
D. Tetanus

Insects responsible for transmitting diseases are called___________?

A. Drones
B. Vectors
C. Hybirds
D. None of these

Disease beri beri is because of___________?

A. Lack of green vegetables in diet
B. Use of milled rice
C. Deficiency of calcium in bones
D. Poor use of citrus fruits

The study of forces acting upon bodies in motion in the air is called__________?

A. Aeronautics
B. Aerophysics
C. Aerodynamics
D. Aerofraction

The study of geographical areas, plants and animal distribution is called_________?

A. Cosmetology
B. Chorology
C. Osteology
D. Mycology

A branch of medicine dealing with eyes and related diseases is called_________?

A. Opthalmology
B. Obstetrics
C. Physiology
D. Haematology

Vitamin B1 is also known as____________?

A. Riboflavin
B. Retinol
C. Thiamine
D. Niacin

Vitamin B2 is also called as__________?

A. Riboflavin
B. Thiamine
C. Ascorbic acid
D. Niacin

Vitamin B3 is also known as__________?

A. Thiamine
B. Riboflavin
C. Niacin
D. Retinol