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
