Which of the following is an instant messaging application?&

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Which of the following is an instant messaging application?
1) WhatsApp
2) Google Talk
3) Viber
Select the correct answer from the codes given below:

[UGC NET Dec 2015 (Paper - I)]

A 1 and 2 only

B 2 and 3 only

C 1 only

D 1, 2 and 3