Play is an unstructured physical activity primarily aimed at enjoyment and fun. It differs from games or sports, which may have rules and competitive goals.
- Option (a): Games involve structured activities with objectives.
- Option (b): Sports emphasize competition and skill.
- Option (d): Athletics includes organized and competitive physical activities.
Thus, option (c) “Play” focuses purely on fun.
Assertion (A): The sum of the first fifteen terms of the AP $ 21, 18, 15, 12, \dots $ is zero.
Reason (R): The sum of the first $ n $ terms of an AP with first term $ a $ and common difference $ d $ is given by: $ S_n = \frac{n}{2} \left[ a + (n - 1) d \right]. $
Assertion (A): The sum of the first fifteen terms of the AP $21, 18, 15, 12, \dots$ is zero.
Reason (R): The sum of the first $n$ terms of an AP with first term $a$ and common difference $d$ is given by: $S_n = \frac{n}{2} \left[ a + (n - 1) d \right].$