Final answer:
The stage of heart failure with no limitation of physical activity and no symptoms during ordinary activity is Stage I (A).
Step-by-step explanation:
The stage of heart failure described by the condition where there is No limitation of physical activity and ordinary physical activity does not cause fatigue, palpitations, or dyspnea is Stage I. In this stage, the individual experiences no symptoms and has no restrictions on their physical activity, signifying that the heart can still pump blood effectively to meet the body's needs. It's crucial to manage heart failure even at this stage to prevent progression to more severe stages.