Which of the following does not belong to the halogen family ?

Option B

Morphine is a phenanthrene derivative . Many synthetic opiates are structural analogs of morphine. These include heroin, hydromorphone, hydrocodone and oxycodone Codeine, i.e., methylmorphine, although found in nature, is produced commercially by adding a methyl (CH₃) group to morphine. Some analogs of morphine are opioid receptor antagonists . That is, they can block and reverse the effects of opiates. Naloxone is an example of an opioid antagonist that is synthesized by replacing the methyl group (CH₃) on the nitrogen (N) found in the structure of morphine with an allyl group (CH₂CH=CH₂).