Random Pop Quiz

Which of these is the longest word that ACTUALLY EXISTS? (i had to put a space in a couple to post the question)
Choose the right answer:
Option A pneumonoultramicro scopicsilicovolcanoconiosis
Option B Antidisestablishmentarainism
Option C mile
Option D Antimendilaritensesquipad alianarianismodologist
 The-Stig posted over a year ago
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