Which of the following device uses the parallel transmission?

مندرجہ ذیل میں سے کون سا آلہ متوازی ٹرانسمیشن کا استعمال کرتا ہے؟

Keyboard

Light pen

Printer

None of these

Printers, especially older models like parallel port (LPT) printers, use parallel transmission to send multiple bits at a time.

Keyboard, mouse, and light pen use serial transmission, sending data one bit at a time.