QUESTION 23

QUESTION 23 
Given: 
 
public class Person {
     private String name;
     public Person(String name) {
         this.name = name;
     }
     public boolean equals(Object o) {
         if ( ! ( o instanceof Person) ) return false;
         Person p = (Person) o;
         return p.name.equals(this.name);
     }
 } 
 
Which statement is true? 
 
A. Compilation fails because the hashCode method is not overridden. 
B. A HashSet could contain multiple Person objects with the same name. 
C. All Person objects will have the same hash code because the hashCode method is not overridden. 
D. If a HashSet contains more than one Person object with name="Fred", then removing another Person, also with name="Fred", will remove them all. 
 
Solution : B