"The tail has jagged edges and a sharp point." (Paragraph 4) Which sentence uses the word sharp in the same way?

1. The girl was a sharp student.
2. The truck made a sharp turn.
3. The knife has a sharp blade.
4. The man gave a sharp answer.​

in   ¨and yet the books¨   by czelaw miloz the tone is positive since it tells us that when we touch a book, it starts to live and the perspective is in the third person and turns once into the first person. in "the rhinoceros" by eugene ionesco the tone is illogical and absurd   and the perspective is in the third person since it is a play.