Which of the following statements are correct?i) logical separation – in which process use different physical objects like separate printersii) cryptographic separation – in which process having different security requirement at different timesiii) Logical separation – In which users operate under illusion that no other processes existiv) cryptographic sepration – In which processes conceal their data and computations

• A. i
• B. i and ii
• C. ii and iii
• D. iii and iv