To solve this problem, we need to identify the correct match between diseases and their symptoms. Let's analyze each option:$\newline \bullet$Option 1: Arthritis – Inflamed joints$\newline$ - Arthritis is a condition characterized by inflammation of the joints, leading to pain and stiffness.$\newline$ - This is a correct match.$\newline \bullet$Option 2: Tetany – High Ca²⁺ level causing rapid spasms$\newline$ - Tetany is actually caused by low levels of calcium ions (Ca²⁺) in the blood, not high levels.$\newline$ - This is an incorrect match.$\newline \bullet$Option 3: Myasthenia gravis – Genetic disorder resulting in weakening and paralysis of skeletal muscle$\newline$ - Myasthenia gravis is an autoimmune disorder, not a genetic disorder, that leads to muscle weakness.$\newline$ - This is an incorrect match.$\newline \bullet$Option 4: Muscular dystrophy – An autoimmune disorder causing progressive degeneration of skeletal muscle$\newline$ - Muscular dystrophy is a group of genetic disorders, not autoimmune, that cause muscle degeneration.$\newline$ - This is an incorrect match.$\newline$Therefore, the correct match is:$\newline$Option 1: Arthritis – Inflamed joints$\newline$This corresponds to the correct option, which is Option 1.