Observe the given figure representing different are pyramids for human population answer the following question.

Identify the correct statements from the following:

(A) Population size can be estimated indirectly
(B) The only measure to know the population size is to count the number of individuals
(C) Tiger census is often based on the number of animals or humans killed
(D) Tiger census is often based on pug marks and fecal pellets

Choose the correct answer from the options given below:

(A) and (D) only

The correct answer is Option (2) → (A) and (D) only