Which of the fallowing root word is greek in derivation A. Pulse b lent C liber D Photo?

Here's why:

* Photo comes from the Greek word "phos," meaning "light."

Let's look at the other options:

* Pulse comes from the Latin word "pulsare," meaning "to beat."

* Lent comes from the Old English word "lencten," meaning "spring."

* Liber comes from the Latin word "liber," meaning "book."

Therefore, only "photo" has a Greek origin.