The pattern followed is that 1 is subtracted from each number and the result is concatenated.
Eg : 4 * 7 * 2 = $$(4-1) (7-1) (2-1) \equiv361$$
and 5Â * 9 * 1 =Â $$(5-1) (9-1) (1-1) \equiv480$$
Similarly, 2Â * 1 * 3 =Â $$(2-1) (1-1) (3-1) \equiv102$$
=> Ans - (D)
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