Assertion(A): A punctured tyre becomes flat more easily in summer than in winter.Reason(R): Rate of diffusion decreases with increase in temperature

The assertion and the reason provided are not correctly related.

Assertion(A): A punctured tyre becomes flat more easily in summer than in winter. This is true because the air inside the tyre expands due to the heat in summer. This causes the air pressure inside the tyre to increase, and if there is a puncture, the air will escape more quickly, causing the tyre to become flat more easily.

Reason(R): Rate of diffusion decreases with increase in temperature. This statement is incorrect. The rate of diffusion actually increases with an increase in temperature. As temperature increases, the kinetic energy of the particles also increases. This causes the particles to move faster and spread out more quickly, increasing the rate of diffusion.

So, the reason provided does not correctly explain the assertion.