Polymetallic nodules on the ocean floor contain significant amounts of – McqOptions

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1.	Polymetallic nodules on the ocean floor contain significant amounts of:
A.	Cu–Ni–Co
B.	Pb–Zn–Ti
C.	Hg–Mo–Pt
D.	U–Th–Nb
Answer» B. Pb–Zn–Ti

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