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Date: 17 June 2026

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Today's important articles list - The Hindu
Date: 13 June 2026.

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Answer: (c) Iron ✅

Explanation

The Earth’s interior is divided into three main layers:

Crust – Outermost layer
Mantle – Middle layer
Core – Innermost layer

The core is composed mainly of Iron (Fe) and Nickel (Ni), often referred to as NIFE (Ni = Nickel, Fe = Ferrum/Iron).

Outer Core: Liquid iron and nickel
Inner Core: Solid iron and nickel due to immense pressure

Iron is the dominant element

Quick Fact

SIAL = Silica + Aluminium (Continental crust)
SIMA = Silica + Magnesium (Oceanic crust)
NIFE = Nickel + Iron (Core)

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Date: 12 June 2026

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