Digital Logic: Identifying self dual function

Given answer: D I am not getting how to approach this question.

Self Dual Boolean Function Example Solved

PPT - Logic Functions: XOR, XNOR PowerPoint Presentation, free

Dual Reporting Structure - FourWeekMBA

What is A Microprocessor And What Are Its Applications

What is meant by self-dual in boolean algebra? - Quora

Unraveling the Digital Markets Act

Network Design: Dual ISP, DMZ, and the Network Edge

DLD, Logic Functions

CMOS Logic Gate - GeeksforGeeks

6.2: Digital Logic Functions - Workforce LibreTexts

The Digital Access Divide - Office of Educational Technology