The carriers and vectors both can:

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Transmit a disease

Cure disease

A primitive organism

Water borne Disease.

answer is A.

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Detailed Solution

Concept- Disease transmission involves both vectors and carriers. A person who has the disease but not the symptoms is considered a carrier because they have the potential to spread it to others. A vector is a creature that can transfer disease from an affected person to a fresh victim who is not already afflicted.
A carrier is a person that contains a genetic mutation that causes a disease, is capable of spreading it to others, and may or may not show any signs of the disease. In epidemiology, a vector is a disease that conveys and spreads an infectious infection into another living organism.
Hence, the correct answer is option 1.

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