Which one of the following countries has been ranked as the least corr

Which one of the following countries has been ranked as the least corrupt country in the Corruption Perception Index 2016 released by Transparency International ?

Denmark
Sweden
Switzerland
Norway
This question was previously asked in
UPSC CAPF – 2017
According to the Transparency International Corruption Perception Index (CPI) 2016, Denmark and New Zealand were ranked jointly as the least corrupt countries (Rank 1) with a score of 90. Among the given options, Denmark is listed and was tied for the top position.
Denmark was ranked among the least corrupt countries in the Transparency International CPI 2016.
The CPI ranks countries and territories based on how corrupt their public sector is perceived to be. It is a composite index, drawing on 13 different surveys and assessments from 12 different institutions that capture perceptions of corruption.