what will be the temperature inisde the cylinder if outside temperature is constant andwithout any source

Question

The outer surface of a long cylinder is maintained at constant temperature. The cylinder does not have any heat source. The temperature in the cylinder will

                                                (IES-00)

(a) Increases linearly with radius

(b) Decreases linearly with radius

(c) Be independent of radius

(d) Vary logarithmically with radius