Mridula has written following statements about the metric unit she would use to measure the same objects. Find the incorrect sentence among the following sentences: P: Centimetre is used to measure the length of a pencil. Q: Kilometer is used to measure distance from one city to another. R: Kilogram is used to measure depth of a bucket. S: Metre is used to measure height of a tree.

• A. Q                                 
• B. R           
• C. S                                 
• D. P