Assertion (A): The reverse saturation current in a semiconductor diode is 4nA at 20°C and 32 nA at 50°C. Reason (R): The reverse saturation current in a semiconductor diode doubles for every 10°C rise in temperature.

• Both A and R are true and R is correct explanation of A
• Both A and R are true but R is not a correct explanation of A
• A is true but R is false
• A is false but R is true