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Two identical blocks of metal are at 20^...

Two identical blocks of metal are at `20^(@)`C and `80^(@)`C respectively. The specific heat of the material of the two blocks increases with temperature. Which of the following is true about the final temperature `T_(f)` when the two blocks are brought into contact (assuming that so seta is lost to the surroundings) -

A

`T_(f)` will be `50T^(@)`C

B

`T_(f)` will be more than `50^(@)`C

C

`T_(f)` will be less than `50^(@)`C

D

`T_(f)` can be either more than or less than `50^(@)`C depending on the precise variation of the specific heat with temperature

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The correct Answer is:
D
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