Let a1, a2, a3, …. be a G. P. of increasing positive numbers. Let the sum of its 6th and 8th terms be 2 and the product of its 3rd and 5th terms be 1/9 . Then 6 (a2 + a4) (a4 + a6) is equal to
(1) 2√2
(2) 2
(3) 3√3
(4) 3