Match the following lists.

List-I	List-II
a. Reflection	1. Twinkling effect of stars
b. Refraction	2. Used for reducing glare
c. Interference	3. Light added to light produces darkness
d. Polarisation	4. Change in path of light without change in medium

Which combination of colour is the most convenient during day and night time?

Lenses with two focal lengths are used by persons suffering from . . . . . . . .

Which one of the following statements regarding lenses is not correct?

Consider the following statements.
1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?