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Bhagyashree Shinde 8Bhagyashree Shinde 8 

Using Rendered or rerender in Vf page.

A custom object "Participant"
In the object, a custom field, "Status" with two options: Participant or Applicant.

Under the Applicant status, only some of the custom fields are visible, eg:
Contact Info
Passport Number
Identity Number has an two option: Addhar No and Pan No
If pan no is selected output field for it should display or vise varsa.

Under the Participant status, the same custom fields and more are visible:
Contact Info
Passport number
T Shirt size
Medical/illness disclosure 
Hi Bhagyashree Shinde,

Did you complete your task?