Three identical conducting rods are connected as shown in figure. Given that θ_a=40^∘C, θ_c=30^∘C...

Three identical conducting rods are connected as shown in figure. Given that θ_a=40^∘C, θ_c=30^∘C and θ_d=20^∘C. Choose the correct options.
(a) temperature of junction b is 15^∘C
(b) temperature of junction b is 30^∘C
(c) heat will flow from c to b
(d) heat will flow from b to d

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