In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.
In each row, first three numbers from left end will be added to the second number and get the fouth number.
Row 1 ==> 6+3+8+3 =Â 20
Row 3 ==> 11+4+7+4 =Â 26
Row 2 ==> 9+5+1+5 =Â 20
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