What is how many ghosts appear in a christmas carol?

In A Christmas Carol by Charles Dickens, four ghosts appear to Ebenezer Scrooge:

• The ghost of <a href="https://www.wikiwhat.page/kavramlar/Jacob%20Marley">Jacob Marley</a>, Scrooge's former business partner.
• The <a href="https://www.wikiwhat.page/kavramlar/Ghost%20of%20Christmas%20Past">Ghost of Christmas Past</a>, who shows Scrooge scenes from his earlier life.
• The <a href="https://www.wikiwhat.page/kavramlar/Ghost%20of%20Christmas%20Present">Ghost of Christmas Present</a>, who reveals the Cratchit family's poverty and other contemporary Christmas celebrations.
• The <a href="https://www.wikiwhat.page/kavramlar/Ghost%20of%20Christmas%20Yet%20to%20Come">Ghost of Christmas Yet to Come</a>, who presents a grim vision of Scrooge's potential future if he doesn't change his ways.