Flash point of fuel oil is

• A. Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
• B. Temperature at which it solidifies or congeals
• C. Temperature at which it catches fire without external aid
• D. Indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off