In the following question, find the number that will come in place of question mark from the given options.

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Given: 

Logic: Lower number - Upper left number = Upper right number

For, 1st figure

26 - 6 = 20

For, 3rd figure

114 - 42 = 72

Similarly, for 2nd figure

42 - 12 = 20

Thus, correct option is (c).