**Category:** Organic Chemistry  
**Subtype:** Chemical Reactions / Biochemistry  
**Problem Description:** The problem involves identifying substances produced during photosynthesis and their transformations. Specifically, it asks for the identification of two substances (X and Z) based on their properties and reactions. Substance X is an amorphous solid formed in plants, which upon hydrolysis yields substance Y, used as a performance-enhancing drug, and fermentation of Y produces substance Z and carbon dioxide.  

**Key Points:**  
- Substance X is related to photosynthesis.  
- Hydrolysis of X leads to Y, which has medicinal applications.  
- Fermentation of Y produces Z and carbon dioxide.  
- The options provided suggest common organic compounds involved in these processes.  

**Goal:** Determine the correct pair of substances X and Z from the given options.