Disadvantages of DTD are

(i)DTDs are not extensible

(ii)DTDs are not in to support for namespaces

(iii)there is no provision for inheritance from one DTDs to another

A. (i) is correct                         

B. (i),(ii) are correct

C. (ii),(iii) are correct             

D. (i),(ii),(iii) are correct

Ans: D