Assertion (A): In vitro testing forms the basis for hazard identification.
Reason (R): In vitro studies are performed within the same biological entities.
Choose the correct answer from the options given below:

Correct option is C

Assertion (A): "In vitro testing forms the basis for hazard identification."
(True,  In vitro testing (tests done outside a living organism, typically in test tubes or petri dishes using cells or tissues) is a foundational step in toxicology and pharmaceutical research.
It's often used in hazard identification to determine if a substance has the potential to cause harm, before moving to in vivo (animal or human) studies.
Reason (R): "In vitro studies are performed within the same biological entities."
(False, In vitro literally means “in glass” and refers to studies outside a living organism.
These are not performed within the same biological entities, but outside the body, often on isolated cells, tissues, or biochemical systems.
The statement confuses in vitro (outside the body) with in vivo (within the living organism).
Correct Answer: (C) (A) is true but (R) is false