The answer wil be 2.
This was asked , c+2[p]-6[p]-1
Look at 2[c] - 6[p] this will be evaluate as ( T - I)
the difference in ascii walue of T and I will be 11.
So it will boil down to c + 11-1
means c+10 and the address for stringlength will become like strlength("17');
That is 2