If an atom loses an e- it will be turned into?

If an atom loses an e- it will be turned into?

  1. a) Neutral
  2. b) Anion
  3. c) Proton
  4. d) Cation

From the BREB Assistant General Manager (O&M / E&C) 2021 – Preliminary exam, question 41 of 48.

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