Basic General Knowledge
The Rh factor refers to

the ratio of red corpuscles to white corpuscles in the blood
a protein substance found in the blood of some people
a hormone carried by the blood
a process that speeds up the clothing of blood

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Basic General Knowledge
DRDL stands for

Department of Research and Development Laboratory
Defence Research and Development Laboratary
Differential Research and Documentation Laboratary
None of the listed here

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