Which one is correct?

1. The scientists have carried out ________and made a break-through in cancer treating

a. a research

b. some researches 

c. some research

2. We need someone with ___________pubic relations.

a. an�.at

b.nothing�.in

c. an�.of

1. � C-The scientists have carried out some research   and made a break-through in cancer  treating.

2. B �We need someone with experience in public relations.

2. We need someone with ___________pubic relations.

It �s spelled correctly in your answer: