What is the definition of euthanasia?

The definition of euthanasia primarily refers to the act of ending a person's life in a manner that is painless and dignified, usually to relieve suffering from an incurable condition. Option B captures this essence by highlighting the aspect of dying easily, quietly, and painlessly, which is a central principle of euthanasia. The underlying goal of euthanasia is often to provide a humane and compassionate end to suffering, reflecting the intention behind its practice.

The other options describe concepts that do not align with the definition of euthanasia. For example, the first option refers to an involuntary action, which contradicts the voluntary nature of euthanasia as understood in medical ethics. The choice regarding organ donation pertains to a legal process that is distinct from euthanasia. Finally, the option related to mental illness treatment does not address the focus on end-of-life scenarios associated with euthanasia. Thus, the correct answer encapsulates the true meaning and intent behind this sensitive subject.