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One nanometer is equal to:

One nanometer is equal to:

A. 10⁻⁹ meters

B. 10⁻⁶ meters

C. 10⁻³ meters

D. 10⁻¹² meters

Correct Answer: A. 10⁻⁹ meters

Explanation: One nanometer equals 10⁻⁹ meters meters, a billionth of a meter.

The Dyarchy system introduced in British India was based on:

Selenium, a trace element, works closely with Vitamin ___ in the body.

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