Solution
The pattern followed is = $$a\times b=a\times(b-1)$$
Eg : $$7\times(8-1)=7\times7=49$$
and $$4\times(4-1)=4\times3=12$$
and $$6\times(4-1)=6\times3=18$$
Similarly, $$9\times(6-1)=9\times5=45$$
=> Ans - (C)
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