Q:

Which of the following statements is true?
 (I) Primary storage units have faster access time and less storage capacity than secondary storage units.
 (II) Primary storage units have sequential access.
 (III) Secondary storage units are non-volatile storage.

• 1
  (I) and (II) only
• 2
  (I) and (III) only
• 3
  (II) and (III) only
• 4
  All (I), (II) and (III)