1. Nucleus is a dense membrane bound structure. 2. Nucleus contains the chromosomes 3. Chromosomes in turn contain the genetic material, DNA. Regarding 1,2 and 3:

Question

( a ) 1 is incorrect but 2 and 3 are correct
( b ) All are correct
( c ) 2 is incorrect but 1 and 3 are correct
( d ) 3 is incorrect; 1 and 2 are correct