In each of the following questions. select the missing number from the given responses.
Let the number in the first row be 'a' , in the second row be 'b' , in the third row be 'c' and in the fourth row be 'd'.
The pattern followed is : $$(b*c - a = d)$$
=> Missing number = 6*9 - 3 = 54-3 = 51
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