If 5 November 2019 was Tuesday, then what was the day of the week on 5 November 2021?

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.

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From 5 November 2019 to 5 November 2020:

The year 2020 is a leap year (divisible by 4).

Number of days = 366 days

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From 5 November 2020 to 5 November 2021:

The year 2021 is not a leap year.

Number of days = 365 days

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Total number of days from 5 November 2019 to 5 November 2021:

Total days = 366 + 365 = 731 days

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To find the day of the week, we calculate $731 \mod 7$:

$731 = 7 \times 104 + 3$

This means 731 days = 104 complete weeks + 3 extra days

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Starting from Tuesday and adding 3 days:

Tuesday → Wednesday → Thursday → Friday

Therefore, 5 November 2021 was Friday.

The correct answer is Option 1: Friday.