Multiple choice general knowledge

Full form of ISD?

  1. International Subscriber Data

  2. identification subscriber data

  3. Identification subscriber dailing

  4. International Subscriber Dialling
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

ISD stands for International Subscriber Dialling, which is the correct expansion. Option A uses 'Data' instead of 'Dialling'. Option B uses 'identification' and 'data' incorrectly. Option C has 'Identification' (wrong word) and 'dailing' (typo for dialing).

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