Assertion (A): Area of given rhombus = 10 cm x 10 cm = 100 cm2 Reason (R): ⇒ OA = 5√3 cm ⇒ AC = 2 x 5√3 cm = 10√3 cm ⇒ OB = 5 cm ⇒ BD = 2 x 5 cm = 10 cm Area of rhombus ABCD = AC x BD = 10 x 10 cm^2 = 100 cm^2 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.