To solve this problem, we need to identify which of the given options can induce mutations in plant cells. Let's analyze each option:$\newline \bullet$Kinetin:$\newline$ - Kinetin is a type of cytokinin, a class of plant hormones that promote cell division.$\newline$ - It is not known to induce mutations.$\newline \bullet$Infrared rays:$\newline$ - Infrared rays are a type of electromagnetic radiation with longer wavelengths than visible light.$\newline$ - They are primarily associated with heat and do not have enough energy to cause mutations.$\newline \bullet$Gamma rays:$\newline$ - Gamma rays are high-energy electromagnetic radiation.$\newline$ - They have enough energy to penetrate cells and cause changes in DNA, leading to mutations.$\newline$ - Therefore, gamma rays are commonly used to induce mutations in plant cells.$\newline \bullet$Zeatin:$\newline$ - Zeatin is another type of cytokinin, similar to kinetin, and is involved in promoting cell division and growth.$\newline$ - It does not induce mutations.$\newline$Based on the analysis, the correct option is:$\newline$Option 3: Gamma rays