What could be the maximum number of Mondays in the month of October ?

The correct answer is (b).

A year has 365 days, which is evenly divisible by 7, so there will always be at least 5 Mondays in a month. However, if the year is a leap year, then there will be 29 days in February, which means that there will be 6 Mondays in February and 5 Mondays in the following month, October.

The other options are incorrect because they are not possible. A month can have at most 31 days, so there can never be 7 Mondays in a month. A