#Amniocentesis is a technique used to- ?
A) Determine errors in amino acid metabolism in embryo
B) Pin-point cardiac ailments in embryo
C) Determine any hereditary genetic abnormality in embryo
D) All of the above

Thank you!
But it is used to detect metabolic disorders too. So, can we say that the correct option is D?

Yes, true. It can detect metabolic disorders - but most of the time only the rare and inherited ones. Moreover the answer cannot be all of the above - even if one of the options is not applicable.  It does not pin point to cardiac ailments . 

But, I may be wrong all the same. Pls confirm. But I will stick with C - most appropriate and fully correct option.
Hope this helped ! :))

ANS IS C

Ans is
                     
                            """C"""''''