Correct Answer: Monday

Solution : Code for months –

Code for days –

Code for centuries –

For, 24th of October 2011 –
Formula: {Date + (Month code) + (Century code) + ( last two digit of the year) + ((last two digit of the year / 4)'s Quotient)} / 7

Date = 24
Code for the month (October) = 0
Code for the century (2000) = 6
(2011 = 2000 + 11; For 2000 it will be 6 and for 11 it will be 11)
And, 11 ÷ 4 = 2(Quotient)
Now, on adding them we get→24 + 0 + 6 + 11 + 2 = 43
On dividing 43 by 7, we get 1 as a remainder.
1 is the code for Monday.

So, the 24th of October 2011 will be Monday. Hence, the second option is correct.