Preoperative assessment shows a Mallampati (ML) score of III and thyromental distance (TMD) of < 6cm. A grade 3 to 4 on Cormark and Lehane is predicted. Compared to the ML score, the TMD is
A less sensitive, less specific
B less sensitive, more specific
C more sensitive, less specific
D more sensitive, more specific
E equal sensitivity an specificity
Answer: B