Which of the following ways have helped in controlling epidemics in India after 1921 ?

(A) Better medical facilities
(B) Programmes for mass vaccination
(C) Improved Sanitation
(D) Inadequate means of transportation and communication

Choose the correct answer from the options given below:

(A), (B) and (C) only

The correct answer is Option (2) → (A), (B) and (C) only

Better medical facilities, programmes for mass vaccination, and improved sanitation have all contributed to controlling epidemics in India after 1921. Inadequate means of transportation and communication did not directly contribute to controlling epidemics.