RNA are produced by the chromosomes, and protein is bound to the chromosome (which helps make the lampbrush shape we see), but the chromosome itself consists of a very long strand of DNA alone

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[QUOTE=mhz99;701583]RNA are produced by the chromosomes, and protein is bound to the chromosome (which helps make the lampbrush shape we see), but the chromosome itself consists of a very long strand of DNA alone[/QUOTE]
Even I had ticked dna but unfortunatelly it is wrong.

The above quotation is not mine but it is of a medical professional. Rna are in no case found in chromosome. Of the remaining choices dna was the correct one

[url]https://www.google.com.pk/search?q=chromosomes&ie=utf-8&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-beta&channel=sb&gws_rd=cr&ei=3XwUU-AC5cDSAeWLgJgI[/url]

[url]http://www.genome.gov/26524120[/url]

Let's ask a medical professional whether chromosome contains rna or not

[QUOTE=mhz99;701783][url]http://www.genome.gov/26524120[/url][/QUOTE]

have you even read your link? It says

[I]Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA).[/I]

that means it certainly does not comprise only of DNA

Yes I have read it. There was no option of dna plus protein in paper

Dna is the main constituent thus it is more preferable option than protein only

Dna is the right ans