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CAT Previous Year Paper | CAT VARC Questions | Question 21

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Question 21 : 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.

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Explanatory Answer

3 is a general statement that outlines the main idea of the paragraph. So, 3 is the starting sentence. All other sentences relate to Veena Sahajwalla's approach to solve the problem of e-waste. So, 1, which introduces Veena, follows 3. 4 outlines Veena's plan and 2 adds to 4, explaining how she plans to separate, extract and reuse the tangle of materials in e-waste.

3142 is the correct order.

The answer is '3142'

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