If 12th January 2015 was Monday, then what day of the week was it on 26th January 2016?

Correct option is C

Given: 12th January 2015 was Monday, then to find the day on 26th January 2016:
Days from 12th January 2015 to 12th January 2016= 365 days (since 2015 is not a leap year).
Days from 12th January 2016 to 26th January 2016= 14 days.
Total days= 365 + 14 = 379 days.
Calculating the day of the week:
379 days ÷ 7 = 54 weeks and 1 day.
1 day after Monday (12th January 2016 was a Tuesday).
Result: 26th January 2016 was a Tuesday.
Answer: (c) Tuesday.