Let α, β be the roots of the equation x2 − px+ r = 0 and 2,2αβ be the roots of the equation x2 − qx+ r = 0. Then the value of r is?

• A. 2 (p q)(2q p)9− −
• B. 2 (q p)(2p q)9− −
• C. 2 (q 2p)(2q p)9− −
• D. 2 (2p q)(2q p)9− −