Which of the following is true for K strain for E. coli?

• A. It contains of restriction-modification system which is encoded by hsDMRS locus
• B. hsDR encodes for endonuclease which is responsible for cleaving the DNA sequence containing ‚Äö√Ñ√∂‚àö√ë‚àö¬®AACGCNNTGC-
• C. Cleavage is carried out when the second A is non methylated
• D. hsDR mutation can be used for cleavage of incoming unprotected DNA