A X-rays I think this is the answer
C. DNA Polymerase matches adenine to thymine and cytosine to guanine. Two identical double helixes are produced.
Answer:
The DNA of the baby shares the DNA of both father and mother, and hence a cross link between an O type mother (Taylor) and an AB type father (Tyler) will produce children with blood groups A and B. It will be impossible to give birth to a child with blood group O.
It is A. Lung tissue i believe.