Hansel wants to buy 2 dice of different colours. If the available colours in a store are red, blue, green, yellow, pink and white, how many different combinations of 2 dice are there in the store? (Example: 1 combination is yellow and white) 
选项为:A:$$5$$  B:$$10$$  C:$$15$$  D:$$20$$  E:None of the above  请回答其中一个选项.