What inspired reflecting road lights to be invented?

The point within the Earth where earthquakes originate is _________?

A. Comma
B. Origin
C. Epicenter
D. Focus

Deficiency diseases are caused due to the deficiency of___________?

A. Proteins
B. Vitamins
C. Carbohydrates
D. Fats

Earth is divided into following three layers?a. Crust, Mountains, Oceans
b. Crust, Mantle, Trenches
c. Trenches, Mountains, Core
d. Crust, Mantel, Core

 

Only male frog produce croacking sound because _________ ?

A. Male frog can magnify their voice with the help of sound box.
B. Male frog have three pair of vocal cord
C. Female frog have larynx but no vocal cord
D. Female frog have no larynx

The scientific study of teeth is called ____________?

A. Odontology
B. Ornithology
C. Orthoepy
D. Pedagogy

Vitamin B3 is also known as__________?

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

Vitamin B3, also called niacin, is one of the eight B-complex water-soluble vitamins. Niacin has a wide range of uses in the body, helg functions in the digestive system, skin and nervous system.