Question:medium

What is the Four Colour Theorem?

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Four Colour Theorem: \[ \chi(G)\le4 \] for every planar graph \(G\). Remember: "At most four colors", not necessarily exactly four.

Updated On: Jun 25, 2026

The chromatic number of a wheel graph is no greater than four
The chromatic number of a planar graph is no greater than four
The chromatic number of a bipartite graph is no greater than four
The chromatic number of a planar graph is equal to four

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The Correct Option is B

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