5 girls and 10 boys sit at random in a row having 15 chairs numbered as 1 to 15, then the probability that end seats are occupied by the girls and between any two girls and odd number of boy sit is
A. 20×10!×5!/15!
B. 10×10!×5!/15!
C. 20×10!×30!/15!
D. 10×10!×5!/25!