Assertion : Surgery has been found highly effective in lung cancer.
Reason : Resection is possible after the thoracotomy.

Assertion : Aids virus has been found in urine of patients affected by AIDS Reason : Person should be kept isolated from the family.

Assertion : Tobacco has been used for human beings for more than four centuries. Reason : smoking is associated with increased incidences of cancers of lung, urinary bladder and throat bronchitis emphysema , coronary heart disease gastric ulcer. etc,

Assertion: Seed plants are highly evolved. Reason: Seeds are found in gymnosperm and angiosperms.

Assertion: Iron is found in free state in nature. Reason: Iron is not highly reactive metal.

Assertion : Teflon has high thermal stability and chemical inertness. Reason : Teflon is highly cross-linked polymer.

Assertion : The value of dynamic friction is less than the limiting friction. Reason : Once the motion has started, the inertia of rest has been overcome.