S1: In a recently opened laboratory just north of London, an experiment is under way to discover how the liver will respond to a new drug.(i) Tests could also be carried out in animals, such as rats or dogs, as is required by regulations.(ii) Normally, such a test would be carried out on liver cells cultured in rows of dishes.(iii) It contains a miniature liver made from human cells and promises more reliable results.(iv) But this experiments uses a small device about the size of a smart phone.S6: It is one the first commercial versions of what bioengineers call an organ-on-a-chip.

S1: In a recently opened laboratory just north of London, an experimen

1.	S1: In a recently opened laboratory just north of London, an experiment is under way to discover how the liver will respond to a new drug.(i) Tests could also be carried out in animals, such as rats or dogs, as is required by regulations.(ii) Normally, such a test would be carried out on liver cells cultured in rows of dishes.(iii) It contains a miniature liver made from human cells and promises more reliable results.(iv) But this experiments uses a small device about the size of a smart phone.S6: It is one the first commercial versions of what bioengineers call an organ-on-a-chip.
A.	(i) (iv) (ii) (iii)
B.	(ii) (i) (iv) (iii)
C.	(i) (iv) (iii) (ii)
D.	(ii) (iv) (iii) (i)
Answer» C. (i) (iv) (iii) (ii)

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