To pass default values to a job in Jenkins using URL we generally use "parambuild" option like below,
Ex: https://jenkins/job/Sandbox/parambuild?Test=foo

I have 3 input parameters for a job and are of drop_down type. Now i want to pass default values for 2 parameters, so i used the below URL directly to get values selected for 2 parameters, but when i see all three parameters changed as text fields although their type is drop_down, so users has to remember the choices for the third parameter, but instead if the default drop_down type is in place, then Users can easily select from the list we have,
Ex URL: https://jenkins/job/Sandbox/parambuild?Test=foo&Test1=foo1

Attached images.