Assertion (A): According to the information in the given figure, the length of BC = 10 cm. Reason (R): BC = √13^2 - 12^2 cm = 5 cm = AC = √20^2 - 12^2 cm = 16 cm ∴ AB = AC - BC = 11 cm 1. A is true, R is false. 2. A is false, R is true. 3. Both A and R are true. 4. Both A and R are false.