Air enters a duct at 20°C at a rate of 0.08 m³/s, and is heated to 150°C by steam condensing outside at 200°C. The error involved in the rate of heat transfer to the air due to using arithmetic mean temperature difference instead of logarithmic mean temperature difference is
(a) 0%

(b) 5.4%

(c) 8.1%

(d) 10.6%

(e) 13.3%