Concept:The day of any date is found by counting the total odd days from the reference year 1 AD. Odd days are the remainder when the total days are divided by 7. Each odd day maps to a specific weekday.
Explanation:First, consider the 2000 years before 2003. 1600 years and 400 years both have 0 odd days. So odd days up to 2000 = 0.
Next, the years 2001 and 2002 are ordinary years. Each ordinary year has 1 odd day. So odd days from these 2 years = 1 + 1 = 2.
Now, January 2003 up to the 16th. Number of days = 16. Odd days =
16÷7 gives remainder 2. So odd days from January = 2.
Total odd days = 0 + 2 + 2 = 4.
Mapping odd days to weekdays: 0 = Sunday, 1 = Monday, 2 = Tuesday, 3 = Wednesday, 4 = Thursday. Hence 4 odd days correspond to Thursday.
Answer:Thursday (Option A)