**Before going to school, you should:**

**a) Brush your teeth**

Brushing your teeth is an essential part of maintaining good oral hygiene. It helps remove plaque and food particles, prevents bad breath, and reduces the risk of tooth decay and gum disease. By brushing your teeth before going to school, you start your day with fresh breath and a clean mouth, which can boost your confidence and overall well-being. Additionally, maintaining good oral health is important for your overall health as well.

**b) Take breakfast**

Breakfast is often referred to as the most important meal of the day, and for good reason. It provides you with the necessary energy to kick-start your day and helps improve concentration and focus in school. Eating a nutritious breakfast can also prevent overeating later in the day and contribute to a balanced diet. Some healthy breakfast options include whole grain cereals, fruits, yogurt, eggs, and whole wheat toast. By eating breakfast before going to school, you ensure that your body has the fuel it needs to function optimally.

**c) Have lunch**

While having lunch is important, the question specifically asks about activities before going to school. Therefore, having lunch would not be relevant for this particular scenario.

**d) Both (a) and (b)**

The correct answer is option 'D' because both brushing your teeth and having breakfast are important activities to do before going to school. Brushing your teeth ensures good oral hygiene and fresh breath, while having breakfast provides you with the necessary energy and nutrients to start your day on a positive note. By incorporating both activities into your morning routine, you prioritize your oral and overall health, which can have positive impacts on your academic performance and overall well-being.