Step 1: Understanding the clues.
The four clues – Crimson, Vermilion, Magenta, and Scarlet – are all well-known shades within the red colour spectrum. Each of them represents a different tone or variation of red.
Step 2: Evaluate the options.
(A) Red – This is correct because all four clues are shades of red.
(B) Blue – None of the clues belong to the blue family.
(C) Colours – Although these are colours, the question requires a *specific* association, not a general one.
(D) Pigments – While these shades may involve pigments, this option does not directly connect to all clues as precisely as "Red."
(E) Shades – True but too broad; the question asks for the specific shared category.
Step 3: Conclusion.
The only specific colour family to which all four clues belong is “Red.”