A small chicken (k = 0.45 W/m K, = 0.15 10 -6 m 2

A small chicken (k = 0.45 W/m · K, α = 0.15 × 10^-6 m²/s) can be approximated as an 11.25-cm-diameter solid sphere. The chicken is initially at a uniform temperature of 8ºC and is to be cooked in an oven maintained at 220ºC with a heat transfer coefficient of 80 W/m²·K. With this idealization, the temperature at the center of the chicken after a 90-min period is
(a) 25°C

(b) 61°C

(c) 89°C

(d) 122°C

(e) 168°C