How to create a rule validation that makes the 2nd value visible only if the first value is YES

Hi Team, 

I am trying to create a validation rule where if I have a picklist value named " Current Medical " Yes/No

If "Current Medical " = Yes than "Benefits Carrier" Shows Up as a text field

If "Current Medical" = No , than "Benefits Carrier" Doesn't show up 

Thank you very much for your help. 

#Validation Rule  #Sql Queries  #Picklist Dependency