The following bar graph shows the results of an annual examination in a secondary school.

Read the bar graph (Fig. 23.28) and choose the correct alternative in each of the following:

(i) The pair of classes in which the results of boys and girls are inversely proportional are :

(a) VI, VIII (b) VI, IX

(c) VIII, IX (d) VIII, X

(ii) The class having the lowest failure rate of girls is

(a) VII (b) X

(c) IX (d) VIII

(iii) The class having the lowest pass rate of students is

(a) VI (b) VII

(c) VIII (d) IX