title: What HTTP status response code return if the request is missing or wrong value(multiple choice) path parameter?
body: <p>A REST API with path parameter: /search/{option} , the {option} parameter has a list of possible values "A","B","C". GET method is only used.</p>
  
  <p>What is the appropriated status code to give when {option} parameter is passed with worng value( for example "D")? and if the parameter is missing?</p>
  
  <p>If the path parameter is missing the final endpoint: /search/ This service doesn't exist.</p>