Answer: Option 'a' is correct.
Explanation:
Since we have given that
Total balance =$221.57
But,
The bank statement shows total balance= $203.73
Difference between them is still outstanding is given by

when we consider the option (a),
(which says I and III)
$20.25 check to the florist and $38.09 check deposit
So, it becomes in total

So, these two things are still outstanding because of this there is difference in balance .
So, option 'a' is correct.