I would suggest that answer (b) is correct - and always has been. That's what I was taught nearly 40 years ago ...
That answer also agrees with
CAP413, Chapter 6 Page 11, viz:
QTE - True bearing of the aircraft from the station (i.e. ...... True bearing, True bearing ..... Approach G-ABCD request True bearing (or QTE) G-ABCD).
JD
