Choose the correct option considering the statements.
Statement A: Packaging of chromatin at higher level requires additional set of proteins that are collectively referred to as non-histone chromosomal proteins. 
Statement B. Heterochromatin is transcriptionally active.

• A

  Only A is correct.

• B

  Only B is correct.

• C

  Both A and B are correct.

• D

  Both A and B are incorrect.