Hide and Show Rows based upon Validation Selection

You need to add the sheet name and set up the validation for B3.

function onEdit(e) {
  if(e.range.columnStart==2 && e.range.rowStart==3 && e.range.getSheet().getName()=='Sheet92') {//add your sheet name
    if(e.value=='Yes') {
      e.range.getSheet().showRows(4,9);
    }
    if(e.value=='No') {
      e.range.getSheet().hideRows(4,9);
    }
  }
}