Following is a leaf node in an OSB flow
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Start node
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Route node
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Branch node
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None of the above
B
Correct answer
Explanation
The Route node in OSB message flow is a leaf node because it represents the final action - after routing the message to a Business Service, the flow for that branch terminates. Start node initiates the flow, and Branch nodes create parallel processing paths (none are leaf nodes). Only Route nodes mark the conclusion of a message flow branch.