In division sum, the divisor is 4 times the quotient and twice the remainder.If a and b are respectively the divisor and the divided, then

A

$$\frac{4a-a^{2}}{a}$$=3

B

$$\frac{4a-a^{2}}{a}$$

C

$$(a+1)^{2}$$=4b

D

$$\frac{a(a+2)}{b}$$=4