Which of the following statements are true about an m-shell n-tube Heat Exchanger?

• A. It has m+1 shell partitions and n+1 tube passes
• B. Temperature takes m-1 turns for shell and n-1 turns for tube
• C. Temperature takes m+1 turns for shell and n+1 turns for tube
• D. It has m-1 shell partitions and n-1 tube passes