C-12-Q157mediumsingle_mcqThe temperature range of Heber process is—a25–35∘C25\text{–}35^\circ\mathrm{C}25–35∘Cb130–150∘C130\text{–}150^\circ\mathrm{C}130–150∘Cc450–550∘C450\text{–}550^\circ\mathrm{C}450–550∘Cd1000∘C1000^\circ\mathrm{C}1000∘C