BCD is a weighted Code which is 8421.
and BCD Code 0-9 digits only.
for eg. let's take N=12, and now convert 12 into binary which is (1100)2
now Convert N=12 into BCD(Binary Coded Decimal) which is 0001 0010
How do we convert the Binary number to BCD: just ADD 0110 into the Binary Number.
So 1100+0110=10010 (make pair of 4 from right So 0001 0010 which is 12)
Now Move to the question:-
given BCD is 11011.1100 make pair of 4 we see its range is not between 0-9..So we need to correction it by adding 0110 to the place where the range is not between 0-9.
0001 1011.1100
+
0000 0110.0110
=
0010 0010.0010
now make pair of 4 and we see
22.2
So ans is B