Given below are two statements : Statement (I) : NaCl is added to the ice at $$0^{\circ}C$$, present in the ice cream box to prevent the melting of ice cream. Statement (II) : On addition of NaCl to ice at $$0^{\circ}C$$ , there is a depression in freezing point. In the light of the above statements, choose the correct answer from the options given below :

Statement I: NaCl is added to ice at 0°C in the ice cream box to prevent melting of ice cream.

When NaCl is added to ice, the freezing point is depressed below 0°C. This means the ice-salt mixture can reach temperatures below 0°C, which helps keep the ice cream frozen. So NaCl does help prevent melting of ice cream. Statement I is TRUE.

Statement II: On addition of NaCl to ice at 0°C, there is a depression in freezing point.

This is a standard colligative property. Adding a solute (NaCl) depresses the freezing point of water. Statement II is TRUE.

Both statements are true. Statement II provides the reason for Statement I.

The correct answer is Option 4: Both Statement I and Statement II are true.