Correct Answer  Option 2 : Monday
Odd days:
A leap year has 366 days and a nonleap year has 365 days.
Leap year = 366 days or 52 weeks and 2 days. So, here the number of odd days are 2.
Non  Leap year = 365 days or 52 weeks and 1 day. So, here the number of odd days is 1.
Number of odd days in the following years
2017

2018

2019

2016

1

1

1

2

Total number of odd days in all the years combined = 1+1+1+2 = 5
Code of the day

Day

0

Sunday

1

Monday

2

Tuesday

3

Wednesday

4

Thursday

5

Friday

6

Saturday

8th February 2020 was Saturday
Code for Saturday is 6 and the number of odd days in all the years combined is 5. So, 6  5 = 1
1 is the code for Monday.
Hence, 1^{st} February 2016 was Monday.