A. 3 : 4
B. 2 : 4
C. 4 : 2
D. 4 : 3
5% of A + 4% of B = 2 / 3 ( 6% of A + 8% of B )
=> ( 5 / 100 ) x A + ( 4 / 100 ) x B = 2 / 3 ( ( 6 / 100 ) x A + ( 8 / 100 ) x B )
=> ( ( 1 / 20 ) x A + ( 1 / 25 ) x B ) = ( 1 / 25 ) x A + ( 4 / 75) x B
=> A / B = 100 / 75
=> A / B = 4 / 3 = 4 : 3