Explanation:

- Option 1: Capital Expenditure - These are costs incurred to acquire or improve long-term assets like buildings, machinery, or equipment. Payment of honorarium does not lead to any acquisition or value addition to long-term assets.

- Option 2: Revenue Expenditure - These are expenses incurred for the day-to-day running of a business, such as salaries, rent, or utilities. Payment of honorarium to a secretary fits here as it’s part of the routine operating costs.

- Option 3: Cash Expenses - This option indicates any expense paid in cash. While honorarium can be a cash expense, this classification doesn’t define its nature in financial reporting terms.

- Option 4: None of these - This would only apply if the honorarium did not fit any of the given categories.

- Correct Answer: Option 2 - Revenue Expenditure