Which of the following is not a correct example of muscular force?

Which of the following is not a correct example of muscular force?

1. A person lifting a bucket of water placed on the ground with both his hands.
2. A person lifting a book on the table with both his hands.
3. A person stops rowing a boat with both his hands then boat stops after travelling some distance in the water.
4. A person pushing a table placed on the floor with both his hands.