Answer is C
In the Manchester encoding, a logic 0 is indicated by a 0 to 1 transition at the centre of the bit and a logic 1 is indicated by a 1 to 0 transition at the centre of the bit.
Original Data Value Sent
Logic 0 0 to 1 (upward transition at bit centre)
Logic 1 1 to 0 (downward transition at bit centre)
For example, The pattern of bits " 0 1 1 1 1 0 0 1 ", the Manchester code will be 01 10 10 10 10 01 01 10