AP EAPCET 3 Sep 2021 Shift 1 Paper

T. O. Diener (1971) discovered a new infectious agent that was smaller than viruses. Consider the following statements about this infectious agent.
(i) It causes potato spindle tuber disease
(ii) These are infections RNA particles
(iii) It lacksthe protein coat
(iv) The molecular weight of its RNA is
low The above statements are assigned to ________