Let the radius of the first circle be $r_{1}$ and second circle be $r_{2}.$
Given that$:\pi r_{1}^{2} + \pi r_{2}^{2} = 153\pi$
$\implies r_{1}^{2} + r_{2}^{2} = 153\rightarrow(1)$
and $r_{1} + r_{2} = 1.5\rightarrow(2)$
We know that $(a+b)^{2} = a^{2} + b^{2} + 2ab$
$\implies (r_{1} + r_{2})^{2} = r_{1}^{2} + r_{2}^{2} + 2\:r_{1}r_{2}$
$\implies 15^{2 }= 153 + 2\:r_{1}r_{2}$
$\implies 2\:r_{1}r_{2} = 225 – 153$
$\implies 2\:r_{1}r_{2} = 72\rightarrow(3)$
We know that $(a – b)^{2} = a^{2} + b^{2} – 2ab$
$\implies (r_{1} – r_{2})^{2} = r_{1}^{2} + r_{2}^{2} – 2\:r_{1}r_{2}$
$\implies (r_{1} – r_{2})^{2} = 153 – 72 = 81$
$\implies r_{1} – r_{2} = 9\rightarrow(4)$
Now, solve the equation $(2)$ and $(4),$ we get $r_{1} = 12, r_{2} = 3$
The ratio of the larger to the smaller radius$:\dfrac{r_{1}}{r_{2}} = \dfrac{12}{3} = 4.$
So, the correct answer is $(A).$