Q. Flash point of fuel oil is

• (A) minimum temperature to which1 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