Explanation:

- Option 1 (2017):

The Citizenship (Amendment) Bill was not passed in the year 2017. This option is incorrect.

- Option 2 (2019):

The Indian Parliament passed the Citizenship (Amendment) Bill in 2019. This bill aimed to provide a pathway to Indian citizenship for non-Muslim refugees from Afghanistan, Bangladesh, and Pakistan.

- Option 3 (2015):

The bill was not introduced or passed in 2015. This option is incorrect.

- Option 4 (2016):

The bill was initially introduced in 2016 but was passed by Parliament in 2019. This option is incorrect.