Which of the following statements are incorrect about the experiences of the census officers in the nineteenth century?

A- People refused to cooperate with the census officers.

B- People gave evasive answers to the census officials.

C- Upper-caste people were the only people who were willing to give any information asked by the census officers.

D- It was easy for the census officers to collect the figures for mortality and disease.

C and D

Often people themselves refused to cooperate or gave evasive answers to the census officials. For a long while they were suspicious of census operations and believed that enquiries were being conducted to impose new taxes. Upper-caste people were also unwilling to give any information regarding the women of their household: women were supposed to be secluded within the interior of the household and not subjected to public gaze or public enquiry.
Census officials also found that people were claiming identities that they associated with higher status.
Similarly, the figures of mortality and disease were difficult to collect, for all deaths were not registered, and illness was not always reported, nor treated by licensed doctors.
Thus historians have to use sources like the census with great caution, keeping in mind their possible biases, recalculating figures and understanding what the figures do not tell.