Which of the following statements are incorrect?
I. If f(x) and g(x) are one-one then f(x)+g(x) is also one-one
II. If f(x) and g(x) are one-one then f(x)⋅g(x) is also one-one
III. If f(x) is odd then it is necessarily one-one.
II and III only
I and II only
III and I only
I, II and III
I. f(x)=x and g(x)=−x or f(x)=x and g(x)=−x3
II. f(x)=x and g(x)=x3
III. f(x)=sinx which is odd but not one-one or f(x)=x2sinx which is odd but many-one