If M=N691, K=P652, L=O522 then which are correct? A) O=L441 B)D=W925 C)B=Y25 D)N=M169

The given codes seem to follow a pattern. Let's break it down:

1. M=N691: Here, the letter after M in the alphabet is N and the square of 26 (position of M in the alphabet) is 676, add 15 to it we get 691.
2. K=P652: Here, the letter after K in the alphabet is P and the square of 11 (position of K in the alphabet) is 121, add 531 to it we get 652.
3. L=O522: Here, the letter after L in the alphabet is O and the square of 12 (position of L in the alphabet) is 144, add 378 to it we get 522.

Now, let's apply this pattern to the options:

A) O=L441: Here, the letter after O in the alphabet is P, not L and the square of 15 (position of O in the alphabet) is 225, add 216 to it we get 441. So, this option is incorrect.

B) D=W925: Here, the letter after D in the alphabet is E, not W and the square of 4 (position of D in the alphabet) is 16, add 909 to it we get 925. So, this option is incorrect.

C) B=Y25: Here, the letter after B in the alphabet is C, not Y and the square of 2 (position of B in the alphabet) is 4, add 21 to it we get 25. So, this option is incorrect.

D) N=M169: Here, the letter after N in the alphabet is O, not M and the square of 14 (position of N in the alphabet) is 196, subtract 27 from it we get 169. So, this option is correct.

So, the correct option is D) N=M169.