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Submarines operate below the surface of the seas.
Answer & Solution
Correct Answer:
Option
D
One word substitute is Subterranean.
Superfluous: unnecessary, especially through being more than enough.
Surreptitious: kept secret, especially because it would not be approved of.
Perspicacious: having a ready insight into and understanding of things.
Subterranean: existing, occurring, or done under the earth's surface.
Superfluous: unnecessary, especially through being more than enough.
Surreptitious: kept secret, especially because it would not be approved of.
Perspicacious: having a ready insight into and understanding of things.
Subterranean: existing, occurring, or done under the earth's surface.
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