Which of the following shows coiled RNA strand and capsomeres?

Poliovirus has ss positive-sense RNA genome and a protein capsid. Tobacco mosaic virus is a plant virus that possesses positive sense RNA genome and capsomere protein, a subunit of capsid that protects genetic material. Measles virus is a ss, negative-strand, enveloped RNA virus. Retro virus is a family of enveloped viruses. Thus, the correct answer is option A.