Question: The four sentences (labelled 1, 2, 3 and 4) given below, when properly sequenced, would yield a coherent paragraph. Decide on the proper sequencing of the order of the sentences and key in the sequence of the four numbers as your answer.
1. Veena Sahajwalla, a materials scientist at the University of New South Wales, believes there is a new way of solving this problem.
2. Her vision is for automated drones and robots to pick out components, put them into a small furnace and smelt them at specific temperatures to extract the metals one by one before they are sent off to manufacturers for reuse.
3. E-waste contains huge quantities of valuable metals, ceramics and plastics that could be salvaged and recycled, although currently not enough of it is.
4. She plans to build microfactories that can tease apart the tangle of materials in mobile phones, computers and other e-waste.
Sentence 3 is the best opening sentence as it introduces the idea of recycling of e-waste.
Sentence 1, 2 and 4 talk about Veena, but sentences 2 and 4 start with pronouns 'her' and 'she' so they should come after 1.
We have 31 as the starting of the paragraph so far.
Sentence 1 talks about Veen having a way to solve e-waste problem, while sentence 4 lists down here plans, hence should follow 1. So we have 14 as a strong pair.
Sentence 3 further elaborates the her plan mentioned in sentence 4 and concludes the paragraph.