Statement I: Increasing the pressure on a confined sample of a gas will decrease its volume.
Statement II: Gas molecules move more slowly as their kinetic energy decreases.

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I.

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Both Statement I and Statement II are correct, but Statement II is not the correct explanation of Statement I.

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Statement I is correct, but Statement II is incorrect.

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Statement I is incorrect, but Statement II is correct.

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Solution

The correct option is B Both Statement I and Statement II are correct, but Statement II is not the correct explanation of Statement I.
Option B is the correct answer.
Pressure and volume are inversely related. When the pressure is increased on a confined sample of gas, its volume will definitely decrease.
Kinetic energy of gas molecules depends on the velocity of the molecules. Because kinetic energy can be expressed as $\frac{1}{2}$ $m v^{2}$ , where 'v' is the velocity of the gas molecules. As the gas molecules move slowly, velocity of the molecules decreases and the kinetic energy of the gas also decreases.

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Statement I: Increasing the pressure on a confined sample of a gas will decrease its volume.Statement II: Gas molecules move more slowly as their kinetic energy decreases.

Statement I: Increasing the pressure on a confined sample of a gas will decrease its volume.
Statement II: Gas molecules move more slowly as their kinetic energy decreases.