Which of the following statements is associated with manganese $(Mn^{2+})$?

  • A
    It acts as a cofactor for enzymes such as phosphatases.
  • B
    It is involved in the structure of many enzymes associated with respiration.
  • C
    It is integrated as a structural component of some amino acids.
  • D
    It plays an important role in the processes of flowering and fruit formation.

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