0 Ques on rinne's and fistula test

Q.38 yr old male presented with suspected diagnosis of supurative labrynthitis. Positive rinne and fistula test were recorded. Pt refused treatment and returned 2 wk later with complains of deafness in affected ear. O/e fistula test was negative. Rinne test when repeated will be
A true positive
B false positive
C true negative
D false negative

ANSWER:

answer: D
initially the suppurative labrynthitis caused SN deafness so rinne's +ve.
2wks later due to condition progressing to dead ear , the rinne's will come false negative i.e the a bone conduction response will come from the opposite ear instead.
Also in dead ear fistula test comes negative.