I want to know the answer to the following question:
What month was a delay caused by Japanese rearguards north of Rangoon?
All the background I'm provided with is that "Slim feared that the Japanese would defend Rangoon house-to-house during the monsoon, placing his army in a disastrous supply situation, and in March he had asked that a plan to capture Rangoon by an amphibious force, Operation Dracula, which had been abandoned earlier, be reinstated.". Is that enough to answer the question?
Answer: no