Question

Earth’s core is mainly made up of ______.

A nickel and iron
B nickel and magnesium
C nickel and alumina
D nickel and copper
Practice Next

Relevant for Exams:

Hey! Ask a query

🎓
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
  • 200 Questions with Detailed Solutions
  • Section-wise Coverage (GA, English, Quant & Reasoning)