[SOLVED] REACT using radio buttons

With any other language this is an absolute doddle but with REACT this is a nightmare.

class RadioRows extends Component {`

    constructor(props) {
         
        super(props);
        this.state = {
            currentVoteResponse: '',
            currentPollId: this.props.pollId
        }
    }   

    sendVote(id, res){  
        //  res needs setting
        console.log('You selected: ID ='+ id + ' RESP=' + res + ' this.props.resp=' +  this.props.resp);
        var resp = this.props.resp;
        /* Api.put('/api/polls/' + resp, null, (err, response) => {
            if (err) { 
                alert("Error: " + err); 
                return;
            }
          */  
      //          console.log("after submitting vote",response)

    //});
    }
    
    
    render(){
        let handleSelector = function handleSelect(e,f) {
                            //e.preventDefault();
                            
                            // TODO not sure how to set state from here:
                            alert(e + 'You selected: ' + f);
                            this.sendVote(e, f)
                            //this.setState({radiovalue:e.target.value});
                            console.log("previous radio value",this.state.bind(this))
                            console.log("new radio value",e.target.value)
                            
            }
    
    
            return (
            <div className="responseBox">
                
                <label><input key={this.props.key} name="megha" 
                        onClick={() => this.sendVote(this.props.pollId, this.props.resp)}
                        type="radio" 
                        placeholder="bawa" 
                        value={this.props.resp}  />
                            &emsp;{this.props.resp}
                        </label>&emsp;
                current score: {this.props.votes}
            </div>
            );

    }
    
    // () => this.sendVote(this.props.pollId, this.props.resp)
    
    // <div className="boldText width25pct"> {this.props.resp} </div>
    //  <button key={this.props.key} onClick={this.vote.bind(this)}>Vote</button> (not needed)
}


RadioRows.propTypes = {
  resp: PropTypes.string.isRequired,
  votes: PropTypes.number.isRequired,
  sendVote: PropTypes.func.isRequired
};

I can’t pass the selected value back to the parent.
Any ideas??

I used this idea: http://stackoverflow.com/questions/29694078/how-do-i-use-radio-buttons-in-react