Pour Point of Fuel Oil Is the

Pour point of fuel oil is the

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) it catches fire without external aid
D) indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off