Is there a way to make a field "Always show" but only "required" dependent on another field selection?

[Adrian_Cardelle]

I have a required field (Field A) with 4 values to choose from, in the form of a "drop down". The field (Field B) immediately following Field A is a "text field" meant as an area for comments in respect to the 4th value selection of the "drop downs". 

Is there anyway then to make Field B "ALWAYS SHOW" yet "required" ONLY when a person selects the 4th value from the drop down menu in Field A?

[SanfordWhiteman]

Yes, but only with JS (leave the field as not required by default, then enforce the requirement onValidate if applicable).

[Adrian_Cardelle]

Again, thank you so much for taking the time to answer my questions  It is very helpful!