Question

Which of the following sets of words completes the given sentence?
1.i - telephone, ii - mass
2.i- mobile phone, ii - mass
3.i - newspaper, ii - personal
4.i - postal letter, ii - personal

What does 'ISD' stand for?
1.International Subscriber Dialing
2.International Subscribed Dialing
3.Internet Subscribed Dialing
4.Internet Subscriber Dialing

Answer 1

International Subscriber Dialing

Answer 2

The first sentence seems to be missing - only some sets of words are given.

second question.

ISD - International Subscriber Dialling.  This is the scheme used for decoding the 00 and code of country and routing the call to that particular country.