which of the following devices used as a photoelectric self to indicate a positive on the computer screen? a) keyboard b) mouse c) light pen d) speaker

which of the following devices used as a photoelectric self to indicat

1.	which of the following devices used as a photoelectric self to indicate a positive on the computer screen? a) keyboard b) mouse c) light pen d) speaker
Answer» speaker RIGHT answerExplanation:please MARK as BRANLIST