Fastest distribution of some injectible material/medicine and with no risk of any kind, can be achieved by injecting it into the

The correct option is B Veins
Intravenous injection is favoured as the full effects of the drug are experienced very quickly, in five to ten seconds. It also bypasses first-pass metabolism in the liver, resulting in a higher bioavailability for drugs than oral ingestion. So users get a stronger effect from the same amount of the drug. Intramuscular injections are more painful and drug absorption is variable and unpredictable.

So, the correct answer is 'Veins'