or
or
There is _____ milk in the bottle.
The sentence contains 'only' to add emphasize the little quantity of milk. That rules out option A: Enough. Considering correct sentence framing, If there was 'enough milk'; 'only' wouldn't have been used.
'Much' is used in negative sentences. (There isn't much milk..)
The sentence is positive.
Between, 'few' and 'a little' -
Few is used for plural countable nouns and Little is used with uncountable. Milk is an uncountable noun.
Therefore, Option B 'A little' is the correct answer.
