ANS:B - 10 kgf/m²

To convert the boiler draught from mm water column to kgf/m², we need to know that 1 mm water column is approximately equivalent to 0.0980665 kgf/m². Given that the boiler draught is 10 mm water column, we can calculate: 10 mm water column * 0.0980665 kgf/m² = 0.980665 kgf/m² So, the boiler draught of 10 mm water column is approximately equivalent to 0.980665 kgf/m². Therefore, among the options provided, the closest answer is "1 kgf/m²".