661. Which element is the most abundant in the human body?
A: Hydrogen
B: Oxygen
C: Carbon
D: Nitrogen
662. Enzymes are organic catalysts made up of:
A: Proteins
B: Carbohydrate
C: Fats
D: Glucose
663. What is the number of natural satellites orbiting around the planet Mars?
A: 1
B: 2
C: 3
D: 4
664. Which of the following is not a conductor?
A: Graphite
B: Silicon
C: Aluminium
D: Nickel
665. Monsoon is caused by:
A: Rotation of Moon
B: Rotation of Earth
C: Revolution of Earth
D: Moon revolutions
666. In the human body, there are _ kinds of bones?
A: 4
B: 3
C: 5
D: 6
667. Year is longest on:__?
A: Earth
B: Jupiter
C: Mercury
D: Mars
668. Which of the following helps in the clotting of blood?
A: Vitamin B2
B: Vitamin B1
C: Vitamin D
D: Vitamin K
669. Transistor is a device that converts a weak signal into_____?
A: Strong signal
B: Small signal
C: Both
D: None
670. The Mirror used in the Automobiles is______?
A: Convex
B: Concave
C: Plains
D: Reflective
Admin