Which of the following statements about urban agglomeration are correct?

A. A town and its adjoining urban outgrowths
B. Two or more contagious towns with or without their outgrowth
C. All cities with more than 10 million population
D. A city and one or more adjoining towns with their outgrowths together forming a contiguous spread

Choose the correct answer from the options given below:

A, B, D only

Majority of metropolitan and mega cities are urban agglomerations. An urban agglomeration may consist of any one of the following three combinations:

(i) a town and its adjoining urban outgrowths,

(ii) two or more contiguous towns with or without their outgrowths, and

(iii) a city and one or more adjoining towns with their outgrowths together forming a contiguous spread.

All cities with more than 10 million population are called as Mega City or Megapolis.