Considering all aspects of physical, mental, and social well being, which of the following people has the best overall health?

Introduction / Context:
This question checks understanding of the modern definition of health as given by organisations such as the World Health Organization. Health is no longer viewed only as absence of disease or being physically fit. Instead, it is defined as a state of complete physical, mental, and social well being. Therefore the best option will describe a person whose life is balanced across these three dimensions rather than someone who is simply not sick or who only exercises regularly.

Given Data / Assumptions:

• Health is a broad concept that includes physical, mental, and social components.
• Regular exercise and body weight are part of physical health but do not automatically cover mental or social aspects.
• Not being ill at a given moment does not guarantee overall well being.
• Longevity alone does not show quality of life or mental and social health.

Concept / Approach:
The correct approach is to compare each option with the holistic definition of health. We must look for a description that explicitly or implicitly includes physical fitness, mental stability, and healthy social relationships. Any option that focuses only on one or two aspects, for example only physical activity or only lack of illness, is incomplete. The answer that uses the word balances and mentions social, physical, and mental health most directly matches the accepted definition of overall health used in health education and competitive exams.

Step-by-Step Solution:
Step 1: Examine option A. Exercising regularly and not being overweight both relate to physical well being, but there is no mention of mental or social health.Step 2: Examine option B. Not being ill and being physically active also focus on physical condition at a point in time, again without mental or social components.Step 3: Examine option C. Living longer than grandparents talks about life span, but high longevity may still coexist with stress, isolation, or psychological issues.Step 4: Examine option D. This option explicitly mentions balancing social, physical, and mental health, covering all three major dimensions of wellness.Step 5: Since the question asks about best overall health, the option that includes all three aspects of well being is clearly superior.

Verification / Alternative check:
The standard definition states that health is a state of complete physical, mental, and social well being and not merely the absence of disease or infirmity.Option D directly reflects this definition with the words balances social, physical, and mental health, while the other options focus mainly on physical status or duration of life.Therefore, comparing each option with the official definition confirms that option D is the correct choice.

Why Other Options Are Wrong:
Option A ignores mental and social health; someone may exercise but still be depressed or socially isolated.Option B again misses social and mental aspects and treats absence of illness as enough, which is not true in modern health science.Option C focuses on longevity alone, which says nothing about current quality of life or well being.

Common Pitfalls:
Students often equate health with fitness or absence of disease and quickly choose options like A or B without remembering the formal holistic definition.Another pitfall is to assume that living longer always means better health. A person can live long despite chronic illness or poor mental health.

Final Answer:
Hence the person who best matches the complete definition of health is the one who balances social, physical, and mental health, so the correct answer is A person who balances social, physical, and mental health.