Multiple choice Which of the following are sub-aerial modifications of stem? Bulb Rhizome Runner Stolon Sucker 1 and 2 1, 2 and 3 2 and 4 2, 3 and 4 3, 4 and 5 Reveal answer Fill a bubble to check yourself E Correct answer Explanation Correct answer. Runner, Stolon and Sucker are sub-aerial stem modifications.