UPSC Prelims 2013Science & TechnologyQuestion 16 of 16The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?AGravity is the strongest of the fourBElectromagnetism act only on particles with an electric chargeCWeak nuclear force causes radioactivityDStrong nuclear force holds protons and neutrons inside the nuclear of an atom.See explanation