Consider the following statements about Light year:

1. Light year is a unit for measurement of very large distances.

2. Light year is a unit for measurement of very large time intervals.

3. Light year is a unit for measurement of intensity of light.

Which of the statements given above is/are correct?

Which one of the following regarding density of water at atmospheric pressure is correct?

Which of the following pairs of physical phenomenon and the discover is/are correctly matched?

1. James Chadwick	Photoelectric
2. Albert Einstein	Neutron
3. Marie Curie	Radium

Select the correct answer using the code given below:

LED (a semi-conductor device) is an abbreviation that stands for