If the 4th day of a month is Sunday, which of the following would be the 6th day before the 30th day of that month ?

A. Tuesday
B. Wednesday
C. Saturday
D. Monday

4th day of the month is Sunday.
So, (4 + 7) = 11th day is Sunday
(11 + 7) = 18th day is Sunday
(18 + 7) = 25th day is Sunday
So 6th day before the 30th day is 24th
If 25th is Sunday, 24th is Saturday