Final answer:
The symptoms of brittle hair, skin rashes, vomiting, nausea, and weakness are associated with Vitamin A toxicity, also known as Hypervitaminosis A.
Step-by-step explanation:
The symptoms of brittle hair, skin rashes, vomiting, nausea, and weakness can all occur with the toxicity of several vitamins and minerals. However, among the options provided (Selenium, Vitamin C, Vitamin E, Vitamin A), these specific symptoms are most closely associated with Vitamin A toxicity, which is also known as Hypervitaminosis A. The symptoms of this condition can vary but often include tinnitus (ringing in the ears), blurred vision, hair loss, skin rash, and liver toxicity.