Final answer:
The duty of loyalty in law requires an attorney to put their client's interests first. This includes prioritizing the client's needs and goals, even if it requires questioning their opinion. Carrying out instructions and maintaining confidentiality are important, but not the complete duty of loyalty.
Step-by-step explanation:
The duty of loyalty is a fundamental principle in the field of law, particularly in the context of attorney-client relationships. It refers to the legal obligation of an attorney to put the client's interests ahead of their own. In the given options, the correct example of the duty of loyalty is putting the client's interest first. This means that an attorney must prioritize their client's needs, goals, and objectives when providing legal advice or representation.
Although carrying out a client's instructions without question and keeping a client's confidential information confidential are important aspects of an attorney's duty, they do not fully encompass the duty of loyalty. It is essential for attorneys to exercise professional judgment and advocate for their client's best interests, even if it may require questioning a client's opinion.