The calendar for the year 2025 is same for

• A year's calendar repeats only when the next year begins on the same weekday AND is of the same type (common or leap). January 1, 2025 falls on a Wednesday, and 2025 is a common year (365 days).

• Each common year shifts the starting weekday forward by 1; each leap year shifts it forward by 2. Tracking forward: 2026 starts Thursday, 2027 starts Friday, 2028 (leap) starts Saturday, 2029 starts Monday (Saturday + 2), 2030 starts Tuesday, and 2031 starts Wednesday.

• 2031 is a common year (not divisible by 4), so it has 365 days and begins on Wednesday — exactly matching 2025 in both starting weekday and year type.

• Therefore the calendar of 2025 is identical to the calendar of 2031, making option (c) correct.

• The 6-year gap (2025 → 2031) contains one leap year (2028), giving a total shift of 5 × 1 + 1 × 2 = 7 days, which is exactly one full week, returning the starting weekday to Wednesday.