Which vitamin aids in metabolism and the production of red blood cells?

Vitamin B6 plays a crucial role in metabolism and the production of red blood cells due to its involvement in several key biochemical processes. Specifically, it acts as a coenzyme in the metabolism of amino acids, which are the building blocks of proteins and important for various metabolic pathways. Additionally, Vitamin B6 is essential for the synthesis of hemoglobin, the protein in red blood cells that carries oxygen throughout the body. This highlights its importance in both energy metabolism and maintaining healthy blood cells.

While other vitamins mentioned in the options have their own unique benefits—such as Vitamin B5, which is involved in the synthesis of coenzyme A and fatty acid metabolism, Vitamin B1, which is important for carbohydrate metabolism and nerve function, and Vitamin C, known for its role in collagen synthesis and antioxidant properties—they do not specifically target both metabolism and red blood cell production to the extent that Vitamin B6 does. Hence, Vitamin B6 is the most appropriate answer to the question regarding the aid in metabolism and the production of red blood cells.