Mizoram has made significant progress in reducing:

Infant mortality rates
Maternal mortality rates
Malnutrition rates
All of the above

The correct answer is: d) All of the above.

Mizoram has made significant progress in reducing infant mortality rates, maternal mortality rates, and malnutrition rates.

Infant mortality rate is the number of deaths of infants under one year of age per 1,000 live births. In 2015, the infant mortality rate in Mizoram was 18.8 deaths per 1,000 live births, which is significantly lower than the national average of 34.5 deaths per 1,000 live births. This progress is due to a number of factors, including improved access to healthcare, better nutrition, and increased awareness of the importance of early childhood care.

Maternal mortality rate is the number of deaths of women due to pregnancy-related causes per 100,000 live births. In 2015, the maternal mortality rate in Mizoram was 100 deaths per 100,000 live births, which is significantly lower than the national average of 167 deaths per 100,000 live births. This progress is due to a number of factors, including improved access to healthcare, better nutrition, and increased awareness of the importance of maternal health.

Malnutrition rates are the proportion of children under five years of age who are underweight, stunted, or wasted. In 2015, the malnutrition rate in Mizoram was 23.4%, which is significantly lower than the national average of 38.4%. This progress is due to a number of factors, including improved access to food, better nutrition, and increased awareness of the importance of nutrition.

The progress that Mizoram has made in reducing infant mortality rates, maternal mortality rates, and malnutrition rates is a significant achievement. It is a testament to the efforts of the government, the community, and individuals to improve the health of the population.