Final answer:
The format name does not match the variable type.
Step-by-step explanation:
c. The format name does not match the variable type.
In the given PROC FORMAT step, the format name is defined as $agegp, which suggests that it is a character format. However, the variable Age is stated to be a numeric variable. Therefore, the format name and variable type do not match, making statement c true.
Statements a, b, and d are false. Statement a is false because the value 65 is included in the range 'low-65', so it will be displayed as 'Non Retirement'. Statement b is false because the value 66 is included in the range '66<-high', so it will be displayed as 'Retirement'. Statement d is false because text strings for formatted values can include spaces.