Statements:\nI. Conflicts in the mind create tension.\nII. Resolution of conflict leads to good mental health.\n\nConclusions:\nI. One becomes very hefty and physically strong by resolving one's conflicts.\nII. Freedom from conflict leads to good mental health.

Introduction / Context:
The premises connect internal psychological conflict with tension and assert that resolving such conflict yields good mental health. We examine two conclusions: one about physical strength and one about mental health.

Given Data / Assumptions:

• Mental conflict → tension.
• Conflict resolution → good mental health.
• No information about physical stature or muscular strength.

Concept / Approach:
Conclusion II restates the essence of Statement II in slightly different words and therefore follows. Conclusion I introduces an unrelated attribute (hefty/physically strong), which is not addressed in the premises and cannot be inferred from them.

Step-by-Step Solution:
1) Align terms: conflict resolution pertains to mental health, not physique.2) Accept II as a paraphrase of the given causal link.3) Reject I due to absence of any physical-strength premise.

Verification / Alternative check:
Even if someone remains physically weak, conflict resolution could still improve mental health; the premises are independent of bodily strength.

Why Other Options Are Wrong:
Only I or Both: inject an extra dimension (physical strength) not mentioned. Neither: ignores the direct entailment of II.

Common Pitfalls:
Conflating psychological well-being with somatic attributes.

Final Answer:
Only Conclusion II follows.