In the following questions, a part of the sentence is printed in bold. Below are given alternatives to the bold part at (1), (2) and (3) which may improve the sentence. Choose the correct alternative. In case no improvement is needed your answer is (4).

My friend lamented that though a complete report was sent to the department a month ago no action is being taken so far.

• no action has been taken

• no action was taken

• no action had taken

• no action had taken