Is it possible to write a program that says?: If A1=A, then "Text", however if A1=B, then Drop Down List, otherwise nothing.

Example: =If(A1="Standard","48x72",if(A1="Options",Drop Down List,"")

I looked it up on Google and saw multiple explanations of how to make 2 different drop down lists dependent on data in another cell. But that's not what I'm trying to accomplish. I need the result to be text if one condition is met or a drop down list if another condition is met.