Given that 5 November 2019 was Tuesday, we need to find the day on 5 November 2021.
The time period from 5 November 2019 to 5 November 2021 is exactly 2 years.
From 5 November 2019 to 5 November 2020:
The year 2020 is a leap year (divisible by 4).
Number of days = 366 days
From 5 November 2020 to 5 November 2021:
The year 2021 is not a leap year.
Number of days = 365 days
Total number of days from 5 November 2019 to 5 November 2021:
Total days = 366 + 365 = 731 days
To find the day of the week, we calculate 731mod7:
731=7×104+3
This means 731 days = 104 complete weeks + 3 extra days
Starting from Tuesday and adding 3 days:
Tuesday → Wednesday → Thursday → Friday
Therefore, 5 November 2021 was Friday.
The correct answer is Option 1: Friday.