Which element is commonly used in nuclear reactors for

Which of the following symbols should replace the question mark (?) in the given expression in order to make L ≤ N definitely true?

Statements: O > Q < R > P = S ≥ T > U ≥ N

Conclusion

I: T < R

II: S > N

Statements: P = W > Y; U < W = X; T ≤ G ≤ Y

Conclusions:

I. T < P

II. P = X

III. U > G

Statements: Z > V = J; V > I; A ≤ D ≤ F = Z

Conclusions:

I. V < D

II. F > J

III. J > I

In these questions, relationship between different elements is shown in the statements. The statements are followed by conclusions.

Statement: G ≤ L ≥ O ≥ W ≥ I < N

Conclusion: I. I < L                            II. L = I

Statements: R > S > T ≥ U; Q ≥ R; W = V < U

Conclusions:

I. S > Q

II. W < T

III. Q > W

Statements: E = Q > R = Y ≤ Z = N; K = Y; L > R

Conclusion: I. N > L II. N ≤ L