Rivers which originate from the glaciers at high altitudes have a supply of water throughout the year. This is because ice in high mountains does not melt all at once. This is due to:

1. high specific heat of ice.
2. low specific heat of ice.
3. low specific latent heat of fusion of ice.
4. high specific latent heat of fusion of ice.

During the change of state of a substance from solid to liquid, heat is absorbed by a body, but its temperature does not rise. Which of the following statements explains the phenomenon?

1. Only K.E of the molecules increases, but P.E remains the same.
2. Only P.E of the molecules increases, but K.E remains the same.
3. Both K.E and P.E of the molecules increase.
4. There is no increase in the P.E and K.E of the molecules.

Assertion (A) : When current is passed through a wire, a magnetic field is generated around the wire.

Reason(R) : Whenever there is a change of magnetic flux linked up with the coil, the induced current is generated in the coil.

1. Both A and R are correct, and R is the correct explanation of A.
2. Both A and R are correct, but R is not the correct explanation of A.
3. A is correct but R is wrong.
4. Both A and R are wrong.