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Assertion $A:$ The beam of electrons shows wave nature and exhibit interference and diffraction.
Reason $R$ : Davisson Germer Experimentally verified the wave nature of electrons.
In the light of the above statements. Choose the most appropriate answer from the options given below :
Statement$-I :$ An elevator can go up or down with uniform speed when its weight is balanced with the tension of its cable.
Statement$-II :$ Force exerted by the floor of an elevator on the foot of a person standing on it is more than his/her weight when the elevator goes down with increasing speed.
In the light of the above statements, choose the correct answer from the options given below :



