Step 1: Understanding the clues.
Cobalt blue, electric blue, sky blue, and turquoise blue are all names of colours in the blue spectrum. Each clue directly corresponds to well-known shades of blue.
Step 2: Evaluate the options.
(A) Lake – Only connects with “sky” (sky lake is not meaningful).
(B) Complexion – Not related to the colour names.
(C) Blue – Fits perfectly with all four clues.
(D) Mood – Only loosely matches “blue mood.”
(E) Metals – Only cobalt is a metal.
Step 3: Conclusion.
The only accurate association for all four colour-related clues is “Blue.”