Answer: D) All the above Explanation: Inventors and their Inventions ::   Sir Richard Arkwright - Father of industrial revolution.   Michael Faraday - Discovered Benzene and invented Bunsen Burner.   Thomas Alva Edison - Invented Phonograph and motion picture camera.

A caste system is a social structure or a class structure in which classes are determined by heredity, that is determined by birth. Loosely, it means that in some societies, if your parents are poor, you’re going to be poor, too. Same goes for being rich if you’re a glass-half-full person.

Answer: B) Shubhangi Swaroop Explanation: Shubhangi Swaroop, the First Woman Pilot inducted into Indian Navy.

Answer: A) 26 min Explanation: Let the required number of minutes = MTotal minutes between 3o'clock and 6o' clock = 180 minutesM + 50 + 4M = 1805M + 50 = 1805M = 130M = 26 minutes.

Answer: A) wrought iron Explanation: Wrought Iron is the purest form of iron. It contains 0.12 to 0.25% carbon and so it is the purest form of iron.

Answer: D) increase the alkalinity of the soil Explanation: Lime is sometimes applied to soil in order to increase the acidity of the soil.

Answer: C) 8 min Explanation: The light from the sun takes about 8 minutes to reach the Earth after it has been emitted from the sun's surface.   The time it takes for light to reach planets in our Solar System varies from about 3 minutes for Mercury to about 5.3 hours for Pluto.

Answer: A) 48 kmph Explanation: we know that speed = distance traveled/time takenlet the total distance traveled by the car is 2x km.then time taken by it to cover first half is x/60 hour.and for second half is x/40 hour.Then average speed= total distance travelled / total time taken.   i.e. 2xx60+x40   => 2x5x120   = 48 kmph.