Final answer:
PubMed is a comprehensive online resource that encompasses a web-based retrieval system, MEDLINE access, article links, and over 27 million citations from the National Library of Medicine.
Step-by-step explanation:
The best description of PubMed is E. All of the above. PubMed is a web based retrieval system that is part of the National Library of Medicine. It provides free access to MEDLINE, the premier scientific database for biomedical literature.
PubMed also provides links to articles and other resources, and includes over 27 million citations for biomedical literature from MEDLINE, life science journals, and online books.
PubMed is a web-based retrieval system that provides free access to MEDLINE and includes over 27 million citations. Therefore, the best description of PubMed is 'E. All of the above.'
PubMed is a web-based retrieval system that is part of the National Library of Medicine. It provides free access to MEDLINE, which is a premiere scientific database. PubMed includes over 27 million citations from MEDLINE and provides links to articles and other resources. Therefore, the correct answer is E. All of the above.