A) Red bloom caused by a red alga
B) Seed bloom caused by a blue-green alga
C) Profuse growth of a red flowered plant
D) Red coloured effluents deposited in it
Correct Answer: B
Solution :[b] Red sea derives its name from the explosive growth of a blue algae, Trichodesmium erythraeum, that every so many years, dyes the normally blue-green water of the Red Sea an orange-red.
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