Question 253168
  AB
+ BA 
------
CD4
Soln:put the value of A & B
A=6 or 8,B=8 or 6 because B+A=4
therefore,8+6 or 6+8 =14 then carry 1
Again 1+A+B=D then D=5 then carry 1
and C=1
ans:68 or 86
Option:(c)86