Direction: Rearrange P, Q, R and S to produce correct sentences by selecting the correct options. The amount of oxygen that plants use is small, P: and is not likely to affect Q: in a modern, ventilated sick-room R: the supply of air S: however

• A.  SPRQ                          
• B.  RPQS
• C.  PQRS                          
• D.  QPRS
• E.  None of these