A. gills ⇢ operculum ⇢ mouth
B. mouth ⇢ gills ⇢ operculum
C. mouth ⇢ operculum ⇢ gills
D. operculum ⇢ mouth ⇢ gills

Correct Answer:

Option B – mouth ⇢ gills ⇢ operculum

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