Explanation:

Introduction:
Rohan has come back after playing in the park and is feeling tired. In order to regain his energy instantly, he should consume a food item that provides instant energy. Among the options given, the correct answer is option B, which is a banana.

Explanation:
Here is a detailed explanation of why a banana is the best choice for Rohan to get instant energy:

1. Nutritional Value:
Bananas are rich in carbohydrates, which are the primary source of energy for the body. They contain natural sugars like fructose, glucose, and sucrose, which are easily digestible and provide an instant energy boost.

2. High in Fiber:
Bananas are also high in dietary fiber, which aids in digestion and helps in maintaining a healthy digestive system. This ensures that the energy from the banana is released gradually, providing a sustained energy level rather than a sudden spike followed by a crash.

3. Natural Electrolytes:
Bananas are a good source of natural electrolytes like potassium, which helps in maintaining proper nerve and muscle function. When we engage in physical activities, our body loses electrolytes through sweat, and consuming a banana can help replenish these electrolytes and prevent muscle cramps and fatigue.

4. Portable and Convenient:
Bananas are easily portable and can be consumed on the go. They come in their own natural packaging, making them a convenient snack option for individuals who are on the move or need an instant energy boost.

Conclusion:
In conclusion, a banana is the best choice for Rohan to get instant energy after playing in the park. It is a nutritious fruit that provides carbohydrates, fiber, and natural electrolytes, all of which contribute to an immediate energy boost. Additionally, its portability and convenience make it an ideal choice for a quick snack.