The Postal Index Number, or PIN, system was introduced in India on which date?
- A.15 August 1947
- B.26 January 1965
- C.15 August 1972
- D.1 April 1986
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Explanation
The correct answer is C, 15 August 1972. The six-digit Postal Index Number was brought into use on 15 August 1972 to replace the practice of writing out long postal addresses that often repeated place names found in several states. Option A is wrong because 15 August 1947 is the date of independence; the posts then still worked on the colonial system without numeric codes. Option B is wrong because no postal reform of this kind took place in 1965, and the date is offered only because it combines a Republic Day with a plausible year. Option D is wrong because 1986 is the year Speed Post was launched by the Department of Posts, a separate development that candidates often confuse with the PIN. Note also that the PIN shares its introduction date with Independence Day, which is how it is best remembered.