Input and output devices – UGC NET Question

Statement C is the only wrong statement because it reverses the actual function of a scanner. A scanner converts physical documents or images into digital form, not the other way round. Statements A, B and D correctly describe the roles of keyboard, monitor and speakers as input and output devices. Therefore, the correct option is the one that selects only statement C as wrong.

Option A:
Option A is incorrect because it lists both A and C as wrong statements. Statement A correctly identifies the keyboard as a common input device used to enter text and commands. By treating a true statement as wrong, this option does not match the factual understanding of input devices.

Option B:
Option B is correct because it isolates statement C as the only wrong statement. Statement C mischaracterises the function of a scanner, while the other three statements accurately describe standard input and output devices. Since the question asks for the wrong statement(s), choosing only C matches the requirement.

Option C:
Option C is incorrect because it groups A, B and C as wrong statements. Both A and B correctly refer to the keyboard and monitor and should not be considered wrong. By including true statements alongside the false one, this combination cannot be the right answer.

Option D:
Option D is incorrect because it marks B, C and D as wrong statements. Both B and D correctly describe the monitor and speakers as output devices. Including these accurate descriptions among the wrong statements makes this option conceptually inconsistent.