Final answer:
The correct answer is c) Photo editing app. The other options are common math-related apps. Photo editing app is not math-related and is not commonly used for math-related tasks.
Step-by-step explanation:
The correct answer is c) Photo editing app. All the other options, including a) Calculator app, b) Khan Academy, and d) Wolfram Alpha, are common math-related apps for school-level students on Android mobile.
c) Photo editing app is not a math-related app and is not commonly used for math-related tasks. It is primarily used for editing and enhancing photos.
Math-related apps such as a) Calculator app are useful for performing calculations, b) Khan Academy provides educational videos and exercises on various math topics, and d) Wolfram Alpha is a computational knowledge engine that can solve math problems and provide step-by-step solutions. These apps are often used by students to help them with their math studies.