Radish is an example of a) fusiform rootb) napiform rootc)conical rootd)tuberous root

Radish is an example of napiform root.

To explain in detail:

Fusiform root: It is a taproot that is swollen in the middle and tapers at both ends. Examples include carrots and beetroot.
Napiform root: This type of root is round or swollen at the top and tapers towards the bottom. Radish is a classic example of this root shape. The radish's edible part is thick and bulbous, with a noticeable taper at the bottom.
Conical root: This root has a conical shape, wider at the top and gradually narrowing towards the tip. Examples include turnips.
Tuberous root: This root has irregular swelling and does not taper, often found in plants like sweet potatoes.
So, the correct answer is b) napiform root.