Question

I could
of the
tells by the
milk that it had gone​

Answer 1

Answer:

COB (Clot on Boiling) : Take a few spoonful of milk say 30 milk and heat it in a dish either on a stove or in a microwave oven, and bring to spoil, smell it, spoiled or on the verge spoiling milk will gives sour smell,/off smell, and depending on the degree of spoilage, it clots.