For all positive integers m, [m]=3m when m is odd and [m]=(1/2)*m when m is even. What is [9]*[10] equivalent to?  Choose the correct choice from the following options
A) [ 25 ]
B) [ 135 ]
C) [ 30 ]
D) [ 90 ]
E) [ 45 ]

Rationale: [ 9 ] * [ 10 ] = 27 * 5 = 135 = 3 * 45 = [ 45 ] the answer is e .
Answer: E