Filaria, malaria, dengue fever, sleeping sickness, yellow fever are transmitted by

Assertion: $LSD$ and marijuana are clinically used as a analgesics.

Reason: Both these drugs suppress brain function.

Use of which causes destruction of chromosomes

Smoking increases ______ content in blood and reduces the concentration of haembound oxygen. Fill the blank suitably

Tobacco contains ……….. which raise blood pressure and increase heart rate.