The correct answer is D
Which type of Fire extinguisher is used for Petroleum fire?
What is the dominant component of Earth's atmosphere?
Which device is used for locating submerged objects under the sea by using sound waves?
What type of change is exemplified by the burning of wood and digestion of food?
What does a slow decline in barometric pressure typically indicate?
Which of the following definitions does not match the term?
Which moon is the smallest in the solar system?
The first laser was built by Theodore H. in which year?
What is the most abundant gas in the Earth's atmosphere.
Which set of the following gases is most important for greenhouse effect?
