Which of the following is not plural form?

Which of the following is not plural form? Correct Answer Formula

Singular  Plural Bacterium (ব্যাকটেরিয়া)  Bacteria Medium (মাধ্যম)  Media Formula ( সূত্র, পদ্ধতি) Formulae Genus (গণ) Genera
Bissoy MCQ

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