Option 1: Jyoti Prakash Nirala - This option is not correct. Jyoti Prakash Nirala was not posthumously conferred with the Ashoka Chakra in 2019.

Option 2: Nazir Ahmad Wani - This option is correct. Nazir Ahmad Wani was posthumously conferred with the Ashoka Chakra in 2019. He was a Kashmiri militant-turned-soldier, serving in the Indian Army. Wani displayed exceptional bravery during an anti-terrorist operation in 2018, where he eliminated two terrorists but was fatally injured in the process. His gallant actions earned him the highest peacetime gallantry award, the Ashoka Chakra.

Option 3: Hangpan Dada - This option is not correct. Hangpan Dada was not conferred with the Ashoka Chakra in 2019.

Option 4: Mohan Nath Goswami - This option is not correct. Mohan Nath Goswami was not conferred with the Ashoka Chakra in 2019.

In conclusion, the correct answer is option 2, Nazir Ahmad Wani, who was posthumously conferred with the Ashoka Chakra in 2019.