JSFiddle - React, Tailwind, and code Playground

HTML

<label >Master</label>
								<select onchange="onChangeYesNo(this)">						    					
								<option value="Master1">Master 1</option>
								<option value="Master2">Master 2</option>
								</select>

								<label >Numbers</label>
								<select id="numbers">							    					
								<option value="1">Number 1</option>
								<option value="2">Number 2</option>
								<option value="3">Number 3</option>
								<option value="4">Number 4</option>
								<option value="5">Number 5</option>
								</select>
								
								<label >Letters</label>
								<select id="letters">							    					
								<option value="A">Letter A</option>
								<option value="B">Letter B</option>
								<option value="C">Letter C</option>
								<option value="D">Letter D</option>
								<option value="E">Letter E</option>
								</select>

JavaScript

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
function onChangeYesNo(option) {
  if(option.value == "Master1"){
    document.getElementById("numbers").disabled = true;
	document.getElementById("letters").disabled = false;
  }
    if(option.value == "Master2"){
    document.getElementById("numbers").disabled = false;
	document.getElementById("letters").disabled = true;
  }
}
</script>