उत्तर : 3. "सोयाबीन "
व्याख्या :

soybeans contain the highest amount of protein. Soybeans are a complete protein, meaning they provide all nine essential amino acids that the human body cannot produce on its own. Other high-protein vegetables include lentils, chickpeas, black beans, and green peas. Including a variety of these plant-based protein sources in your diet can contribute significantly to your protein intake.