Which of the following options does NOT give the lengths of three sides of any triangle?

18, 23, 41

Three sides form triangle iff

Sum of two sides of triangle > Third side

Lets solve it one by one for each option :-

A. 12, 18, 25

 12 + 18 > 25

30 > 25

B. 18, 23, 41

18 + 23

= 41

( It is 41 which is equals to third not greater than 3rd side )

So, we find the group of 3 sides that do not form a triangle.

No need to solve further

Answer :- B. 18, 23, 41