Total exports = $5$ lakh tonnes
Total revenue = $250$ Crores
Item_1 total export $= 5 lakh*.11 = 55,000 tonnes = 5,50,00,000 kg$
Item_1 total revenue $= 250*.12=30 crores = 30,000,0000$
Item_1 revenue/kg = $\frac{30,000,0000}{55,000,00} = \frac{60}{11}$
Item_2 total export $= 5 lakh*0.22 = 1,10,000 tonnes = 1,10,000,000 kg$
Item_2 total revenue $= 250*0.06=15 crores = 15,000,0000$
Item_2 revenue/kg = $\frac{15,000,0000}{ 1,10,000,000} = \frac{15}{11}$
$\text{Item_1 revenue : Item_2 revenue}$
$=\frac{60}{11} : \frac{15}{11}$
$=4:1$
Correct Answer: $D$