Correct option is B
"a" is used before singular, countable nouns when not referring to a specific item. Since "month" is not specified, "a" is correct.
There are 30 or 31 days in _______ month.
"a" is used before singular, countable nouns when not referring to a specific item. Since "month" is not specified, "a" is correct.
Suggested Test Series
Suggested Test Series