<prompt> Which is not true about Langenbeck Kocher operation?Adequate exposal of posterior segmentAnterior segment is not visualized adequatelySuperior exposure is very well exposedSciatic nerve injury in 10 in cases  <response>: c Superior exposure is very well exposed- Please observe this question is not the same as previous as Kocher-Langenbeck approach is not a good approach for superior segment as its visualization is limited hence D option will be considered acceptable as nerve injuries in earlier studies were more than 6 as compared to now. 