Which of the following is a stem?

🔑Key Points:
-Different parts of plants are considered as food like roots, stem,  leaves, flowers, fruit, seeds.
-Plant roots as a food:  We can eat some roots of the plants like Carrot, Radish, Beetroot, Sweet potato, turmeric turnip.
-Plant Stem as food: Some plants are to their food in their stem (modified the underground)
-Example: Onion, Potato, Ginger, Garlic, Sugarcane.
-Plant leaves as food: The leafy vegetables can be used as food like Spinach, Cabbage.
-Plant flowers as food: Flowers of some plants can be used as fruit.
-Example: Banana plant, Pumpkin plant.
-Plant fruit: Some plants store their food in the form of fruit.
-Example: Apple, Guava, Grapes, Mango​

🔴Additional Information:
– The Potatoes are basically stems even though they grow underground.
-They grow on underground stem known as stolons.
-The swollen stem has buds on it which help in the formation of a new plant and these also make it a stem since roots are devoid of buds.