Hansen took a flight to Perth from Singapore and arrived at $$05:30$$. If the journey took him $$5\text{h}$$ $$40$$$$\min$$, at what time did the plane take off from Changi Airport in Singapore? 
选项为:A:$$11:50$$  B:$$11:10$$  C:$$23:50$$  D:$$23:10$$  请回答其中一个选项.