Increased IMR and decreased MMR in a population will

Options

A. cause rapid increase in growth rate
B. result in decline in growth rate
C. not cause significant change in growth rate
D. result in explosive population

Explanation

To solve the question regarding the implications of increased Infant Mortality Rate (IMR) and decreased Maternal Mortality Rate (MMR) on population growth, we can follow these steps:

### Step 1: Define IMR and MMR
- **Infant Mortality Rate (IMR)**: This is the number of infant deaths (under one year of age) per 1,000 live births in a given year. An increase in IMR indicates that more infants are dying, which can lead to a decrease in the overall population growth as fewer infants survive to adulthood.

- **Maternal Mortality Rate (MMR)**: This is the number of maternal deaths (related to pregnancy and childbirth) per 100,000 live births. A decrease in MMR suggests that fewer mothers are dying during childbirth, which can contribute positively to population growth since more mothers survive to raise their children.

### Step 2: Analyze the Effects of Increased IMR
- An **increased IMR** means that more infants are dying. This leads to a reduction in the number of individuals who can grow into adults, ultimately leading to a decline in the population growth rate.

### Step 3: Analyze the Effects of Decreased MMR
- A **decreased MMR** means that fewer mothers are dying during childbirth. This allows more women to survive and raise children, which can increase the population growth rate since more births can occur without the risk of maternal death.

### Step 4: Combine the Effects
- In the scenario presented, we have:
- **Increased IMR** (decreases population growth)
- **Decreased MMR** (increases population growth)

- Since one factor (IMR) is decreasing the population growth rate while the other factor (MMR) is increasing it, the overall effect on population growth can be seen as a balance between the two.

### Step 5: Conclusion
- Therefore, the combined effect of increased IMR and decreased MMR will not cause a significant change in the overall growth rate of the population.

### Final Answer
- The correct option is: **"not cause significant change in growth rate."**

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