Direction: Read the following bar graph and table and answer the following questions Following bar graph shows the number of people on which a drug is tested in five centres.

The following table shows the number of persons who developed nausea after taking the drugs

Centre   Number of persons developed Nausea

   A                                  40

   B                                  80

   C                                110

   D                                  75

   E                                  30

Note:

(i) 50% of the total volunteers on which the drug is tested in each centre doesn't showed any symptoms.

(ii) Out of the persons who showed symptoms(either Nausea or Placebo) some developed Nausea while remaining developed Placebo.