Need to verify the drop down values based on condition

[santhoshmscsoftware]

I have three drop downs, (1. Country, 2. State, 3. Pincode). 
Need to verify the below items using UFT,

1. Need to verify all the countries have listed in drop down.
2. Need to verify that the states are displaying based on the selection of Country.
3. Need to verify that the Pin codes are displaying based on the selection of State

Please provide the sample snippet for this scenario. Thanks in advance.

[supputuri]

See if you can use API for testing this quickly.