Which one of the following statements is correct? [UGC-II (Geog) 2016]

• A.  One Himalayas were formed due to faulting of the earth's crust
• B.  Himalayas are the oldest mountains
• C.  Himalayas belong to the Caledonian mountain system
• D.  Himalayas have risen from the Tethys Sea when the sea got compressed,