Question $63$

Two bubbles have the same surface tension, but bubble $x$ has $3$ times the diameter of bubble $Y.$ The ratio of the pressure in bubble $x$ to that in bubble $Y$ is:

$1$:$1$

$3$:$1$

$9$:$1$

$0\mathrm{.}3$:$1$

$0\mathrm{.}9$:$1$