Radio failure · Question 43 of 61

In case of radio communication failure prior to receipt or acknowledgement of a clearance to enter a control zone, the pilot shall …

1 answer is correct. Hard Official question catalogue

1. A set the transponder code to Mode A 7600, if possible; land at the nearest suitable aerodrome; and report the arrival time by the most expeditious means to the appropriate ATC unit
2. B set the transponder code to Mode A 7600, if possible; and draw attention to the aircraft by performing circles to the left and to the right
3. C set the transponder code to Mode A 7600, if possible; make a 180° turn, and return to the aerodrome of departure
4. D set the transponder code to Mode A 7600, if possible; and find a suitable emergency landing site