In this question, we need to determine the relationship between the Assertion (A) and Reason (R) provided and identify which option correctly explains this relationship.
Assertion (A): Actions and responses of two athletes may differ during a match situation.
Reason (R): Personality is the combination of an Individual's thoughts, characteristics, behaviour, attitude, and habits.
Explanation:
Based on the above explanation, the most accurate option is:
Sports psychology treats personality as the internal blueprint that shapes how an athlete reacts under pressure. Tracing that idea forward, from definition to real match behaviour, shows how the assertion and reason connect.
Since R supplies the underlying cause and A describes its visible effect, both statements hold together as a correct explanation, not two unrelated facts.
Therefore, the correct answer is Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A).

| List-I | (Traits) | List-II | (Explanation) |
| A | Cardinal Traits | (I) | Based on 3 factors |
| B | Central Traits | (II) | That reflect only in certain circumstances |
| C | Assessment of Traits | (III) | Building blocks that shape most of our behaviour |
| D | Secondary Traits | (IV) | Dominant behaviour |