<prompt> Anastrazole belongs to which class of drug -Estrogen receptor down regulators SERDsSelective estrogen receptor modulators SERMsSelective tissue estrogenic activity regulator STEARAromatase inhibitors  <response>: Ans. is d i.e., Aromatase inhibitors Drugs commonly used in hormone estrogen receptor positive breast cancero SERMs:- Tamoxifen, tromifeneo SERDs:- Fulvestranto Aromatase inhibitors:- Letrozole, anastrazole, exemestone. 