Directions: The following seven (7) items consist of two statements: one labelled as the 'Assertion (A)' and the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below: (a) Both A and R are individually true and R is the correct explanation of A; (b) Both A and R are individually true but R is not the correct explanation of A; (c) A is true but R is false; (d) A is false but R is true. 61.
- ABoth A and R are individually true and R is the correct explanation of A
- BBoth A and R are individually true but R is not the correct explanation of A
- CA is true but R is false
- DA is false but R is true
Explanation
The Assertion is true: phenol (carbolic acid) is a classic, widely used disinfectant — Joseph Lister pioneered its antiseptic use. The Reason is false: phenol is corrosive and toxic to living human tissue, especially at high concentrations; it is precisely because it destroys tissue and microbes that dilute forms are used carefully. Hence A is true but R is false.