Question

Insert article in milk is sold by litre

Answer 1

Answer:

Milk is sold by litres.

Explanation:

because no article is needed

Answer 2

Answer:

@anilarpit7476 your answer is exactly wrong....

Explanation:

it's obvious that an article is needed.

and what I think is that the answer is"THE MILK IS SOLD BY A LITRE. " because milk is uncountable noun and with uncountable nouns THE is used and litre is a unit. so, A is used