science, and a text-book subject.

Explanation

The blank to be filled in is ‘science and _____ a text-book subject.’ The options given are nor, neither, not and none. Nor or neither or none cannot be applied here as the purpose is to negate ‘a text-book subject’. When we negate something, we use not. Without the presence of ‘neither ‘in the sentence we cannot use ‘nor’ and vice versa. The right option is not.