Scan from left to right until you find two operands and one operator one after another. When found evaluate them.
$10 $ $10 $ $+ $ $60 $ $ 6 $$ /∗8- $
$= (10 +10) $ $ 60 $ $ 6/∗8- $
$= 20 $ $ 60 $ $ 6/ ∗8- $
$= 20 $ $ (60/6) $ $ *8- $
$= 20 $ $ 10 * 8 - $
$ = (20*10) 8 - $
$ = 200 $ $ 8 - $
$= (200 -8) $
$=192 $
$\therefore $ Option A is correct