How many micrograms are equivalent to two grains?
130
1,300
13,000
130,000
130,000
Rationale: Since 1 grain is approximately 65 mg, and there are 1,000 micrograms in a milligram, multiply 65 x 1,000 to find 65,000 . Therefore, 2 grains x 65,000 mcg = 130,000 mcg.
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