How to Create Custom Fields in Jira | Creating Jira Custom Fields | Jira Administration

Hello Deepak, Can I have your number for JIRA ITSM configurations? Need your help.

In JIRA, for a certain issue type, I have single-select list with values a, b, c, d.



I have custom text fields of a1,a2, a3, b1, b2, b3,............, d3.



when I choose value "a" from the single select list it should show the custom text fields a1,a2, a3.



when I choose value "b" from the single select list it should show the custom text fields b1,b2, b3.
In the same way for each values of the single select list, its specific text field should be populated.
How do I achieve this in JIRA?
I could not find any custom fields that could provide this solution.