**Question:** In crude death rate the population is taken as on -

A. total population
B. only deaths
C. only survivors
D. average age of the population

**Core Concept:**

The crude death rate (CDR) is a simple measure of mortality rate calculated by dividing the number of deaths in a given period by the number of people in the population during the same period and multiplying the result by 1000. It provides a general idea about the mortality rate in a population without considering the age or sex distribution.

**Why the Correct Answer is Right:**

The correct answer is A. total population, because the CDR is calculated by dividing the total number of deaths by the total number of individuals in the population during the given period. This provides a measure of mortality rate without considering the age or sex distribution of the population.

**Why Each Wrong Option is Incorrect:**

B. Only deaths (Option B) is incorrect because the CDR is calculated using the total population, not just the number of deaths. This option misses the point of considering the entire population.

C. Only survivors (Option C) is incorrect because the CDR is calculated using the total population, not just the number of survivors. This option also ignores the entire population and only focuses on a specific subgroup.

D. Average age of the population (Option D) is incorrect because the CDR is calculated based on the number of deaths and the total population, not considering the age of individuals. This option focuses on an irrelevant factor for calculating the CDR.

**Clinical Pearl:**

Understanding crude death rate (CDR) helps healthcare professionals and public health officials make informed decisions about disease control, healthcare resource allocation, and assessing the impact of public health interventions. It is important to keep in mind that CDR is a simple measure of mortality rate and should be interpreted in conjunction with other health indicators to gain a comprehensive understanding of a population's health status.