Multiple choice general knowledge science & technology

STD

  1. Subsribe Trunk Dialling

  2. Subsriber Trunk Dialling

  3. Subsriber Trunk Dial

  4. Subsribe Trunk Dial
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

STD stands for Subscriber Trunk Dialling, which allows telephone subscribers to directly dial long-distance calls without operator assistance. Option B is correct. Options A, C, and D contain spelling errors ('Subsribe' instead of 'Subscribe' and 'Subsribe' instead of 'Subscriber').

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