A question is given followed by information in three statements. You have to find out the data in which statement(s) is sufficient to answer the question and mark your answer accordingly.

Pipe A can fill the tank in 30 minutes and pipe B also fills the tank in some time. Pipe C alone completely empty the filled tank in 15 minutes, then B alone can fill a completely empty tank when pipe C is shut?

I) A, B and C together they fill the tank in 60 minutes.

II) A and B together fill the tank in 12 minutes.