If an ODI user function has one syntax and one or more implementations, can it be used in an ODI interface mapping?

If an ODI user function has one syntax and one or more implementations, can it be used in
an ODI interface mapping?

A.
Yes, but to be mapped in an ODI interface it also needs an ODI variable.

B.
No,it can only have one syntax and one implementation for all technologies.

C.
Yes,but you need to write a custom knowledge module.

D.
Yes, duringexecution, itwill substitute the specific technology implementation.