Step 1: Treatment in Income & Expenditure A/c.
Outstanding subscription (income accrued but not yet received) is added to subscription received during the year in the Income & Expenditure A/c, because accounts are prepared on accrual basis.
Step 2: Treatment in Balance Sheet.
It is also shown as an asset in the Balance Sheet under “Current Assets” since it is receivable.
Step 3: Conclude.
Thus, outstanding subscription appears in both Income & Expenditure A/c and Balance Sheet.
Final Answer:
\[
\boxed{\text{Both (A) and (B)}}
\]