Discussion
Which principles are corollary to Wallpicture principle ?
(i) Cow-calf principle
(ii) Principle of later-in-time
(iii) Whole - organ principle
(iv) All of the above
Answer: C
The keyed answer is the cow-calf principle and the whole-organ principle, option C, statements (i) and (iii). In Ranganathan's theory of classification the wall-picture principle governs the sequence of classes by the way they would appear in a picture of a wall, and these two principles are listed as its corollaries.
The principle of later-in-time (ii) is a separate principle used to arrange classes in order of time, and the key does not count it among the corollaries of the wall-picture principle. Statement (iv), all of the above, therefore fails, which rules out option D. Options A and B each include the later-in-time principle and are wrong on the key.
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