JAMB Physics 1985 Question 3

Which of the following statements are true about the spring balance and the chemical balance? I. Both are used to measure the mass of an object II. Either of them may be used to measure the weight of an object. III. The spring balance works on the principle of Hooke's law while the chemical balance works on the principle of moments. IV. A change in gravity changes the readings of a spring balance but not that of a chemical balance

1. A.I and IV
2. B.II and III
3. C.III and IV
4. D.I, II and III
5. E.I and III.