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Atomic and Nuclear Physics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsAtomic and Nuclear Physics1 Mark
Question
In helium nucleus, there are(a) 2 protons and 2 electrons(b) 2 neutrons, 2 protons and 2 electrons(c) 2 protons and 2 neutrons(d) 2 positrons and 2 protons
   
   
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Answer

(c) 2 protons and 2 neutrons

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