Explanation:

- Option 1: Calander is the incorrectly spelled word. The correct spelling is "calendar" which refers to a chart or series of pages showing the days, weeks, and months of a particular year.

- Option 2: Career is spelled correctly. It refers to an occupation or profession followed as a life’s work.

- Option 3: Callous is spelled correctly. It describes someone showing or having an insensitive and cruel disregard for others.

- Option 4: Carriage is spelled correctly. It can refer to a vehicle on wheels, like a baby carriage or horse-drawn carriage.

Option 1: calander