Select the number-pair in which the two numbers are related in the same way as are the two numbers of the given number pair.
68 : 30
$$68=17\times\ 2\times\ 2\ \&\ 30\ =5\times\ 3\times\ 2.$$
So, both of them are multiplication of at least two different numbers.
$$520=2^3\times\ 13\times\ 5\ \ and\ \ 350=5^2\times\ 7\times\ 2.$$
but,other pairs are not having the same condition.
So, option D is correct.
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