A statement of Assertion \((A)\) is followed by a statement of Reason \((R)\). 
 
Choose the correct option
 
Assertion \((A)\): If \(2:3 :: 4:6\), then \(2 \times 6 = 3 \times 4\).
 
Reason \((R)\): In a proportion, the ratio of first to second equals the ratio of third to fourth.