The correct answer in this case is "we"
Us is also correct but in that case the sentence would not be an elliptical one. If you use "we" then the sentence is both correct and elliptical which fits the description of the question.
1) Himalayan Range is the result of the motion of Tectonic Plates. 2) The Himalayas is the third-largest snow and ice reserve in the world after Antarctica and the Arctic. 3) There are about 15000 glaciers located in Himalayan Range. 4) Himalaya is the source of the Ganga-Brahmaputra river system.
C. Fashion is harmless entertainment, and education is serious business.
All I heard was a loud 'fwooosh!' from the kitchen, and knew what it had to be. I, in a hurry, swiftly grabbed the fire extinguisher. Or, rather, tried to. Instead it hit the ground with a loud 'clank'. Grateful it wasn't broken, I picked it up and with a loud 'crack', I got the extinguisher working and put out the fire.