<prompt> FNAC is least diagnostic in which thyroid carcinoma:AnaplasticPapillaryFollicularThyroiditis  <response>: Ans. is c Follicular CaFNAC is the best investigation for the diagnosis of all thyroid carcinomas except follicular carcinoma.It cannot differentiate bw follicular carcinoma and follicular adenoma. The definitive diagnosis of carcinoma is made when capsular and vascular invasion by the carcinoma is revealed. 