To determine the truth of the statements regarding phase diagrams given as P and Q, we need to analyze each diagram based on eutectic relations and high-temperature limited solid solutions:

1. The eutectic system typically involves a binary phase diagram where a liquid solution solidifies into two distinct solid phases at the eutectic composition. Generally, it forms an L-shaped diagram that indicates a eutectic reaction.
2. High-temperature limited solid solutions show a range of solid solubility extending up to a certain temperature. At elevated temperatures, the solid retains compositional diversity, usually forming a dome or a convex region in the phase diagram.

Let us now look at the provided phase diagrams (P and Q) to analyze which type of behavior each one represents:

1. Upon examining Diagram P:
   • The phase diagram shape and characteristics point towards a high-temperature solid solution behavior. Such diagrams typically show a region where solid is stable and wide stability over a range of compositions, characteristic of limited solid solutions.
2. Upon examining Diagram Q:
   • The schematic shows distinctive eutectic characteristics, where on cooling from liquid, two distinct solids are formed at a constant temperature, the eutectic point.

Considering the above analysis, the correct statement is:

P shows high temperature limited solid solution and Q shows eutectic relation.

Therefore, the answer is correctly justified by the characteristics of the phase diagrams provided.