A process stream of dilute aqueous solution flowing at the rate of$10$ 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

Counter flow with process stream on shell side

Counter flow with process stream on tube side

Parallel flow with process stream on shell side

Parallel flow with process stream on tube side