Q. Which is the hardest substance in the human body?

? Tooth Enamel

Q. Who invented Zero?

? Indians

Q. Which vitamin is available to the human body through sun bathing?

? Vitamin D

Q. Which branch of Medical Science deals with skin?

? Dermatology

Q. Which instrument is used to measure the density of milk?

? Lactometer

Q. The French Revolution began in which year?

? 1789

Q. What is Magna Carta?

? A historical document curbing the powers of King

Q. The Russian Revolution of 1917 was led by?

? Lenin

Q. Battle of Waterloo was fought in the year?

? 1815

Q. Karl Marx belonged to which country?

? Germany