MPSC PYQScienceenglish
Which of the following sentence is WRONG? (I) Atomic nucleus is made up of protons and neutrons. (II) Proton has a positive charge. (III) Electron has a negative charge. (IV) Neutron has a positive charge.
A.(III) and (II)
B.(II) and (I)
C.Only (I)
D.Only (IV)
Correct answer: D