Answer:
Option D
Explanation:
Let the ages of George, Louis and Sara 10 years ago be $2x$, $3x$ and $4x$ years respectively.
Then, $(2x+10)$ +$(3x+10)$ + $(4x+10) = 93$
$\Leftrightarrow 9x = 63$
$\Leftrightarrow x = 7$.
$\therefore$ Sarah's present age $=(4x+10)= 38$ years.