To solve this problem, we need to identify the first human hormone produced using recombinant DNA technology. Let's analyze the options:$\newline \bullet$Option 1: Insulin - Insulin was the first human hormone to be produced using recombinant DNA technology. It was developed to treat diabetes and was a significant breakthrough in biotechnology.$\newline \bullet$Option 2: Estrogen - Estrogen is a hormone, but it was not the first to be produced using recombinant DNA technology.$\newline \bullet$Option 3: Thyroxin - Thyroxin is a hormone related to thyroid function, but it was not the first to be produced using recombinant DNA technology.$\newline \bullet$Option 4: Progesterone - Progesterone is a hormone involved in the menstrual cycle and pregnancy, but it was not the first to be produced using recombinant DNA technology.$\newline$Based on the analysis, the correct answer is Option 1: Insulin.$\newline$Therefore, the first human hormone produced by recombinant DNA technology is Insulin, which corresponds to Option 1.