A process stream of dilute aqueous solution flowing at the rate of10 Kg.s-1 is to be heated. Steam condensate at 95 C is available for heating purpose, also at a rate of 10 Kg.s-1 . A 1 - 1 shell and tube heat exchanger is available. The best arrangement is

• A. Counter flow with process stream on shell side
• B. Counter flow with process stream on tube side
• C. Parallel flow with process stream on shell side
• D. Parallel flow with process stream on tube side