The correct answer is (d) Finland.
The sex ratio is the number of males per 100 females in a population. A favorable sex ratio is one in which there are more males than females.
According to the World Bank, the sex ratio in Finland is 101.1 males per 100 females. This means that there are 1.1% more males than females in Finland.
The sex ratio in Sweden is 100.5 males per 100 females. This means that there are 0.5% more males than females in Sweden.
The sex ratio in Switzerland is 99.8 males per 100 females. This means that there are 0.2% more females than males in Switzerland.
The sex ratio in the Netherlands is 100.3 males per 100 females. This means that there are 0.3% more males than females in the Netherlands.
Therefore, Finland has the most favorable sex ratio of the four countries listed.