big Endian, little Endian conversion

Question

I know, i know, it might sound very simple, but im confused. if you have the following input

Data : 1100 0101 1010 1101

and you want to convert big-endian to little-endian, or vice versa, which of the following would you consider as a correct output?

1. 1011 0101 1010 0011

2. 1101 1010 0101 1100

Thanks

Answer 1

10101101 11000101

It goes by bytes, 8-bits