make indian states field and get district fields in another custom field automatically as options to select

make indian states field and get district fields in another custom field automatically as options to select

hello community,
I am trying to make 2 fields in my custom form in zoho creator. One field is STATES and another field is DISTRICTS.    I want that when i choose any of states from my states field than automatically i get options of various districts in disrtict field which is present in that selected states. Can any one suggest some idea, how to achieve it.