Genetically modified (GM) crops contain modified genetic material due to :
I. introduction of new DNA
2. removal of existing DNA
3. introduction of RNA
4. introduction of new traits
Select the correct answer using the code given below:

Options

A. 1 and 2 only
B. 1, 2 and 3
C. 3 and 4
D. 1, 2 and 4