Which gas is commonly used to fill

Statement: F < G < H ≥ J; F ≥ K > L

Conclusion:

I. H > L

II. H = L

Statements: S < T < U ≤ W; C > U < V < W ≤ X

Conclusion:

I. S < V

II. T < X

Statements: A > B > C, C < D > E, E = F > G

Conclusion:

I. C = G

II. A > F

Statement: C ≥ D > E < F ≥ G; D ≥ H = J

Conclusion:

I. C > H

II. C = J

Statements: Z ≤ B = G; I > U; I < W < G; Z ≤ X < S

Conclusions:

I. Z < W

II. U < B

III. X > I

Statements: P ≥ Q > R, S ≤ R, T = W ≥ R

Conclusions:

I. T ≥ S

II. Q < W

Statement:

O ≤ P > K ≤ L; W ≤ X = K > R; Q > L

Conclusion:

I. O > K

II. L < P

Statement: L = C; E ≥ M ≥ U ≥ C

Conclusion:

I. E > L

II. E = L

Statements: Z > R = K ≥ X = N ≥ Q, F < B ≤ Q

Conclusions:

I. X ≥ F

II. B ≤ K

III. R > F