In the following question. select the number which  can be placed at the sign of question mark (?) from  the given alternatives.Â
Sum of the numbers in each box is equal.
Eg : $$3+17+11+4=35$$
and $$2+16+10+7=35$$
Similarly, $$6+13+15+x=35$$
=> $$x=35-34=1$$
=> Ans - (A)
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