How are white dwarfs and neutron stars similar?

a. they are both main sequence stars.

b. they are both left over after a star has died. a white dwarf is left over from the death of a low-mass star and a neutron star from the death of a high-mass star.

c. white dwarfs are made of carbon, and so are neutron stars.

d. they both will explode in a supernova when they have died.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."