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The $\text {IUPAC}$ name for the complex $\left[ Co \left( NO _{2}\right)\left( NH _{3}\right)_{5}\right] Cl _{2}$ is :

• A
  Pentaammine nitrito $-N-$ cobalt $(II)$ chloride
• B
  Nitrito $-N-$ pentaammine cobalt $(II)$ chloride
• C
  Nitrito $-N-$ pentaammine cobalt $(III)$ chloride
• ✓
  Pentaammine nitrito $-N-$ cobalt $(III)$ chloride