Answer:

Debiting the purchase of stationary to the General Expenses Account is the correct accounting treatment for M/S Stationary Mart. Here's why:

1. Nature of Stationary:
- Stationary items, such as pens, pencils, notebooks, and other office supplies, are typically considered as general expenses rather than assets.
- These items are consumed or used up in the normal course of business operations and are not intended for resale.

2. Accounting for Expenses:
- In accounting, expenses are recorded to reflect the costs incurred by a business in generating revenue.
- General Expenses Account is used to record the various operating expenses incurred by a business, which are necessary for the day-to-day operations but do not directly contribute to revenue generation.

3. Treatment of Stationary Purchase:
- When M/S Stationary Mart purchases stationary items, it should be treated as an expense rather than an addition to the stock.
- By debiting the General Expenses Account, the stationary purchase is recorded as an expense in the accounting records.
- This reduces the net income of the business, as expenses are deducted from revenue to calculate the profit.

4. Stock Account:
- The Stock Account is used to record and track the inventory of goods that are intended for resale.
- It is generally used for businesses that deal in trading or manufacturing, where the inventory is an essential part of the company's operations.
- Since stationary items are not meant for resale in the case of M/S Stationary Mart, the purchase should not be debited to the Stock Account.

Therefore, the correct accounting treatment for M/S Stationary Mart is to debit the purchase of stationary to the General Expenses Account. This ensures that the expenses are properly recorded and reflected in the financial statements of the business.