C-12-Q167mediumsingle_mcqThe temperature used in urea production is—a40–50∘C40\text{–}50^\circ\mathrm{C}40–50∘Cb130–150∘C130\text{–}150^\circ\mathrm{C}130–150∘Cc450–550∘C450\text{–}550^\circ\mathrm{C}450–550∘Cd25–35∘C25\text{–}35^\circ\mathrm{C}25–35∘C