Read the following statements and choose the set of correct statements : (a) Euchromatin is loosely packed chromatin (b) Heterochromatin is transcriptionally active (c) Histone octomer is wrapped by negatively charged DNA in nucleosome (d) Histones are rich in lysine and arginine (e) A typical nucleosome contains 400 bp of DNA helix Choose the correct answer from the options given below :

1. A. (a), (c), (d) Only
2. B. (b), (e) Only
3. C. (a), (c), (e) Only
4. D. (b), (d), (e) Only

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