Choose the word that is different from the other three.

Correct option is A

Treacherous: This means someone who is deceptive or disloyal, often betraying trust.
Faithful: This means loyal and steadfast in affection or allegiance.
Devoted: This means being dedicated to a cause, person, or belief, showing strong loyalty.
Loyal: This means being faithful to someone or something, supporting or defending them.
Analysis:
Faithful, Devoted, and Loyal all have positive connotations related to trust, dedication, and support.
Treacherous has a negative connotation and implies betrayal and disloyalty.
Conclusion: Thus, the word that is different from the other three is (a) Treacherous.