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Question on Composition relationship.

user12203354Nov 1 2012 — edited Nov 2 2012
Which is true about composition relationship
1. it can be one to many
2. it can never be one to many is always one to many is used to show exclusive ownership
5.never used when an object is owned by exactly one other object.

i think answer shud be 1.
But its answer is 1 and 4.(as per the answers given in the book i am referring to)

why 4 is the answer.I know composition is the relation which says one can not exist without other....then how is it used to show exclusive relationships.
pls clarify...
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Added on Nov 1 2012