Show or Hide Fields According Conditionals

Good morning!

For each type of registration (i have five) form should display or not some fields. Eg: if user choose option 1, the birthday field is mandatory and displayed. If he choose option 2 this field is not mandatory but displayed. So i created another non mandatory field named birth_day_no.
The first field of my form is the options. This field have a "fields conditonal others" if he is empty all fields are hide. The field birth_day_no have "field conditional self" defined if the user choose the option 2, in the options field, he is displayed. The problem is that this condition overriding the conditional of options fields and his is dispalyed when the options is empty. How can i fix this?

You can only condition a field once. There is no AND/OR usage yet. You should also always use condition self instead of condition others in nearly all usecases. Condition others is strictly for simple mass show/hide of several fields to make management easier, but it will be going away in a later release.

For your usage it sounds like a typical profile type condition so I recommend the below.

Display: Field conditional self
Field: FIELD_NAME_HERE
Operator: Equal To
Value: VALUE_HERE
Translate Value: No
Mode: Show