Assertion. Addicts often take alcohol and barbiturates together.
Reason. The combination of these two substances is less harmful to the body.

What is the reason of accumulation of the most harmful substances in human's body ?

Assertion : Less iodine intake causes goitre. Reason : Less iodine in body decreases thyroxine secretion.

Assertion: Absorption of simple sugar, alcohol and medicines takes place in the stomach. Reason: Most of the water is absorbed in the large intestine

Assertion: In electric circuits, wires carrying currents in opposite directions are often twised together. Reason: If the wires are not twisted together, the combination of the wires formes a current loop, the magnetic field generated by the loop might affect adjacent circuits of components.

Assertion: Density of hollows body is always less than the density of substance of equal mass of the body. Reason: Volume of hollow body is greater than the volumeof substance of the body. But mass of hollow body is equal to mass of substance of the body.

Assertion: A few toxic substances often present in industrial water can undergo biological magnification. Reason: Toxic substances accumulated by an organism can not be metabolised or excreted.

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : In electric circuits, wires carrying currents in opposite directions are often twisted together. Reason : If the wires are not twisted together, the combination of wires forms a current loop, the magnetic field generated by the loop, might affect adjecent circuits or components.