During respiration exchange of gases take place in

Options

A. trachea and larynx
B. alveoli of lungs
C. alveoli and throat
D. throat and larynx

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks where the exchange of gases occurs during respiration.

2. **Identifying the Options:**
The options provided are:
- A) Trachea and larynx
- B) Alveoli of lungs
- C) Alveoli and throat
- D) Throat and larynx

3. **Evaluating Each Option:**
- **Option A (Trachea and larynx):** These structures are part of the respiratory system that serve as passages for air but do not facilitate gas exchange.
- **Option B (Alveoli of lungs):** Alveoli are tiny air sacs in the lungs where the actual exchange of oxygen and carbon dioxide takes place. This is the correct answer.
- **Option C (Alveoli and throat):** While alveoli are involved in gas exchange, the throat does not participate in this process.
- **Option D (Throat and larynx):** Similar to option A, these structures are involved in air passage and not in gas exchange.

4. **Conclusion:**
Based on the evaluation, the correct answer is **Option B: Alveoli of lungs**, as they are the primary site for gas exchange during respiration.