$\begin{array}{1 1}(A)\;180000\\(B)\;540000\\(C)\;5\times 10^5\\(D)\;\text{None of these}\end{array} $

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Ways : 9 10 10 10 10 2

0 cannot be placed in the first place.In the other four places any digit can go.After filling the first five places,the last place can be filled by 0 or 5

$\therefore$ The required number of numbers =$9\times 10^4\times 2$

$\Rightarrow 18\times 10^4$

$\Rightarrow 180000$

Hence (A) is the correct answer.

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