You Do Need power plug adapter while traveling from Nepal to Denmark.

Here is Why You Need An Adapter

The outlet and plug type used in Denmark are C, E, F and K and in Nepal are C, D and M. This is how they look like.

Nepal

In Nepal, outlets of type C, D and M are in use.

Type C

Type D

Type M

Denmark

In Denmark, outlets of type C, E, F and K are in use.

Type C

Type E

Type F

Type K