Correct answer is (c) 2^m×5^n
To explain: Let’s, take a number where q is of the form 2^m×5^n, say 2^50×5^10and p can be any integer
\(\frac {p}{2^{50}\times 5^{10}} = \frac {p \times 5^{40}}{10^{50}}\)
The number \(\frac {p \times 5^{40}}{10^{50}}\) will terminate after 50 decimal places.
Hence, if q is of the form 2^m×5^n, it will terminate after some decimal places.