The correct option is D These sediments when subjected to constant compression created a series of fold mountains, ie., the Himalayas.
Leopold Kober, an Austrian geologist formulated the Geosyncline Theory. This theory explains the formation of the Himalayas. According to this theory, the Himalayas were formed from a great geosyncline called the Tethys Sea. The Tethys Sea lied between the Eurasian and the Indo-Australian plate. The thick pile of sediments in the Tethys Sea were subjected to constant compression. This led to the creation of a series of fold mountains one behind the other. Thus, the Himalaya were formed but in different phases. Hence it does not comprise of a single range but a series of at least three ranges running more or less parallel to one another.