The correct Active/Passive form of the sentence is: His passion should be followed.

• The original sentence "Everyone should follow his passion" is in the active voice. It emphasizes the doer of the action (everyone).
• To convert it to passive voice, we need to focus on the object of the action (passion) and make it the subject. Here, "his passion" becomes the subject.
• "Be followed" maintains the present tense of the original sentence.