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Communication Systems - Engineering

Q1:

Some features of advanced mobile phone service are
  1. To provide telephone communication to a large number of telephone users within the area of a metropolitan only
  2. To use minimum amount of frequency spectrum
  3. To permit hand held as well as vehicle operation of telephone
Which of the above are true?

A 1 and 2 only

B 1, 2, 3

C 1 and 3 only

D 2 and 3 only

ANS:B - 1, 2, 3

All the three features are necessary.