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Consider the following statements

1. Each town together with its outgrowth (s) is treated as an urban agglomeration.

2. A conurbation comes into being by coalescence of urban settlements which were separated by open space in the past,

3. The concept of smart cities involves provision of information technology and improvement in infrastructure.

Which of the above statements is/are correct?

A)  1 only                         

B)  1 and 2 only

C)  2 and 3 only    

D)  1, 2 and 3