$A$ chemistry student wants to identify the metal ion in a salt. They make a paste of the salt with concentrated $HCl$ on a clean platinum wire loop. If they take a small amount of this paste and place it in a non-luminous flame,it produces a green flame. Which metal is present?

  • A
    $Barium$
  • B
    $Calcium$
  • C
    $Potassium$
  • D
    $Strontium$

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