In which of the following expression prime factorization has been done

- In which of the following expression prime factorization has been done 24=2×3×4
- In which of the following expressions prime factorisation has been done 56=7×2×2×2
- In which of the following expression prime factorization has been done class
- In which of the following expressions prime factorisation has been done 54
- In which of the following expressions prime factorisation has been done 56
- In which of the following expressions prime factorisation has been done 70