Among the following, identify one that is antiparticle of itself :
A
Photon
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B
Electron
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C
Proton
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D
π -meson
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Solution
The correct option is A Photon ParticleAnti particle Electron Positron Proton Anti Proton Neutron Anti Neutron Positive π meson Negative π meson Positiveμ meson Negative μ meson So, photon is its own anti particle.