All somatic cells have the same genes necessary for normal development.
However, the expression of these genes is different for each cell because the genes not needed are

Transcribed into mRNA

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Not replicated

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Turned off or repressed

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Destroyed by DNA polymerase

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Solution

The correct option is B Turned off or repressed
All somatic cells have same genes but the genes whose product is not needed are turned off. Some genes are expressed constitutively and some genes are turned off and on depending upon the requirement of proteins. This is because of gene silencing through the process of methylation and the phenomenon is known as chromatin remodelling. RNAi also can bring about gene silencing by the formation of silent chromatin. Thus, the correct answer is option C.

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