The Himalayas are the definitive example of a Fold mountain. They were formed by the collision of the Indian and Eurasian plates. While the Nilgiri and Sahyadri (Western Ghats) are often considered structural plateaus or escarpments and the Satpura is a block mountain, the Himalayas consist of folded sedimentary layers of the ancient Tethys Sea. ANSWER: (B) Himalayas