In Time Sequence questions, you are given a question based on date and time. It is required to find out either date or no. of days satisfying conditions in specific question.
1.12.91 is the first Sunday. Which is the fourth Tuesda of December 91 ?
1.12.91 is the first Sunday of December 91.
So, 3.12.91 is the first Tuesday of the month.
Clearly, 10.12.91, 17.12.91, 24.12.91, and 31.12.91 are also Tuesday.
So, 24.12.91 is the fourth Tuesday.