Answer:
The correct answer is Option A.
Explanation:
The concept of double entry says for every debit entry, there must be a corresponding credit entry. This is necessary for the journal entries to balance, that is, the total of the debit balance must always equal the credit balance.
The building purchased by BOC is an asset. So there is need to debit that account to recognize the asset. Since there was an outflow of cash to the tune of $50,000, we need to credit cash while the remaining balance being financed by mortgage will be credited to recognize the liability.