Which statement is NOT correct about the recycle:

a) Separate and purify unreacted feed from products and then recycle. This should be practiced for the reaction with less than 90% single-pass conversion.

b) For species that are difficult to separate, recycle feed and products together and use a purge stream.

c) Recycle feed and products together and do not use a purge stream for those byproducts that come to equilibrium with small conversions.

d) For the feed that contains the inert, recycle without purge.

e) b and d

Explain: Write 1 paragraph per question explaining the reasons to pick the correct answer and why you cannot pick the other options.