Explanation:

A byte is a fundamental unit of digital information, defined as a group of eight bits. Both "10010110" and "01100101" are sequences containing exactly eight binary digits (bits). Therefore, each sequence represents one byte of data. Option (b) Byte is correct. Option (a) Nibble is a group of four bits. Option (c) Bit is a single binary digit. Option (d) Robote is not a standard term in computer science for a unit of data. This definition is crucial for understanding how characters and other data are stored.