Explanation:

Statements:   P < D ≤ U  ,     U = G > B ,      Y < G ≤ L
Conclusions:   L > B ,    P > Y
For conclusion I: L > B
From statements II and III, we get:
B < G ≤ L
Here, the common sign between B and L  is ‘<’. Hence B < L or L > B.
Thus conclusion I follows.
For conclusion II: P > Y
From statements I, II and III, we get:
Y < G = U ≥ D > P
Here, we can see the opposite sign between P and Y, thus no relationship can be established between them.
Hence conclusion II does not follow.
Therefore only conclusion I follows.