$(a)$ 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: