If in a particular year 12th January is a Sunday, then which one of the following is correct?

In a non-leap year, the total number of odd days between January 12 and July 12 is calculated as follows:

Remaining days of January: 19

February: 28

March: 31

April: 30

May: 31

June: 30

July: 12

Summing these gives a total of 181 days. When divided by 7, the remainder is 6, indicating that there are 6 odd days.

If January 12 is a Sunday, then July 12 will be a Saturday in a non-leap year.

However, in a leap year, July 12 will be a Sunday due to the additional day added in February (February 29).