The given ratios indicate that Amal to Sunil is 3:2 and Sunil to Mita is 4:5.
To determine the ratio of shares for all three individuals, let's multiply the ratios:
For Amal, Sunil, and Mita: \((3 \times 4) : (2 \times 4) : (2 \times 5) = 12 : 8 : 10\)
Thus, the ratio of shares of Anil, Sunil, and Mita is indeed \(6: 4: 5\)
∴ Sunil's share \(= 400×\frac 42 = 800\)
So, the correct option is (A): \(800\)