show/hide radio button based on dropdown selections in confiform

[Kartika Barnala]

Hi 

I have scenario where there is dropdown  and radio button field in confiform, ex, let's say

Dropdown

1

2

Radio button options

3

4

Based on selections of these dropdown values, i need a radio button to hide/show the options.

Select 1, show 3 and hide 4

select 2, show only 3 

Could some please guide?