A field supervisor is required to arrange Red, Green, Yellow and Blue so that Red precedes Green, Blue is not first, and Green comes immediately before Yellow. Which sequence qualifies?
- Red, Yellow, Green, Blue
- Red, Green, Yellow, Blue
- Yellow, Green, Red, Blue
- None of these
Explanation
Red must come before Green.
Green must come immediately before Yellow.
Blue must not be first.
Red → Green → Yellow → Blue satisfies all conditions.
Last verified on 11-09-2026
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