Question no : 59 LDM OD Syntax

In SAP LDM, Which of the following Object Dependency does not have syntax error ?
(assume class and characteristics objects are all correct). 

A)  Constraint #1.
      OBJECTS:
           (300)PC where HD = HARD_DISK;
                                    OS = OPERATING_SYSTEM,
           (300)PRINTER where PR = PRINTER_OS.
      CONDITIONS:
           HD specified.
      RESTRICTION:
           OS = PR.

B)  Constraint #2.

      OBJECTS:
           (300)PC where HD = HARD_DISK;
           (300)PC where OS = OPERATING_SYSTEM,
           (300)PRINTER where PR = PRINTER_OS.
      CONDITION:
           HD specified.
      RESTRICTIONS:
           OS = PR.

C)  Constraint #3.

      OBJECTS:
           (300)PC where HD = HARD_DISK,
                                    OS = OPERATING_SYSTEM;
           (300)PRINTER where PR = PRINTER_OS;
           end. 
      CONDITION:
           HD specified.
      RESTRICTIONS:
           OS = PR.

D)  Constraint #4.

      OBJECTS:
           (300)PC where HD = HARD_DISK;
                                    OS = OPERATING_SYSTEM,
           (300)PRINTER where PR = PRINTER_OS.
      CONDITION:
           HD specified.
      RESTRICTIONS:
           OS = PR.

E)  Constraint #5.

      OBJECT:
           (300)PC when HD = HARD_DISK;
                                    OS = OPERATING_SYSTEM,
           (300)PRINTER when PR = PRINTER_OS.
      CONDITION:
           HD specified.
      RESTRICTION:
           OS = PR.
.