A. 15
B. 30
C. 45
D. 100

Explanation:

45 NUST researchers had been ranked among the top 2% of scientists globally. The rankings were compiled using research-related data associated with Stanford University and Elsevier. Such rankings are based on bibliometric indicators and should not be interpreted as a universal ranking of every scientist or research institution.

Important points

• – Institution: National University of Sciences and Technology.
• – Abbreviation: NUST.
• – Number reported: 45 researchers.
• – Ranking sources: Stanford University and Elsevier.
• – Bibliometrics uses publication and citation data to study research output and influence.

Related question and answer:

Q: What is a research citation?

Answer: A reference to another work used to acknowledge or support information in a research publication.