<label for="docPage">Doctor: </label>
<select name="docPage" ng-model="group.doctor">
    <option ng-selected="PickDoctor(doctor)"
            ng-repeat="doctor in doctors"
            value="{{doctor.name}}">
            {{doctor.name}}
    </option>
</select>

self.PickDoctor=function(pDoctor)
{
    doctor=pDoctor;
    console.log(doctor);
}

self.CreateGroup = function() {
                var group = new GroupClass(self.group.name, self.group.code, self.group.doctor,self.group.patient,self.group.usluga);
                group.doctor=doctor;
                group.patient=patient;
                group.usluga=usluga;
                groups.push(group);