Read the text and determine if the sentence is true (see options at the end):

How to prepare for herniated disk surgery<br>Undergo a physical exam and complete any tests deemed necessary by your doctor--possibly a urine sample and an x-ray. You'll also need to supply your medical history. Make sure to note any allergies you have.

Sentence: Tests may or may not be needed 
Options:
i. Yes.
ii. It's impossible to say.
iii. No.