Answer:
a. Working trial balance.
Explanation:
Working trial balance -
It refers to as the balance sheet , which is on the stage of any alterations , is referred to as working trial balance .
It is not the final balance sheet and hence various changes can be done , like adding and subtracting many entries .
The advantage of a working trial balance is to test the complete set of entries in order to find the effect on the financial statements .
Hence , from the given information of the question ,
The correct answer is a. Working trial balance.