Seed Words Duplicated

Security About seeds and wallet
,
1

Is it normal when setting up my wallet for a word to appear twice on the list of 20 words given?

  1. A (different)
  2. B (different)
  3. C (different)
  4. D (different
  5. C (same word as number 3)

Is this normal to have a duplicate word in the list of words given?