AP EAMCET Medical 23 Apr 2019 Shift 2 Paper

Study the following statements
I) Stereocilia are long, non motile cilia like processes and are found in epididymis, internal ear etc.
II) Os cordis is a cartilage bone
III) Adjacent myocardial cells are joined by gap junctions
IV) Nissil bodies represent the smooth endoplasmic reticulum
Identify the correct statements