Postman Bob was tasked to deliver a parcel to Alice.

"Which route should I take?" Bob asked his manager before departing.
"You don't have to worry about that, Bob. There is only one route to reach there!" the manager said.

Which of the following roadmaps has only one possible route from Bob's office to Alice's house?

Details and Assumptions:

  • Roads are bidirectional, so Bob can travel in either way.
  • Bob cannot use the same road more than once.

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