Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is$?

• A. Vertical heat exchanger with steam on tube side
• B. Vertical heat exchanger with steam on shell side
• C. Horizontal heat exchanger with steam on tube side
• D. Horizontal heat exchanger with steam on shell side