Given below are two statements :

Statement I : Sphalerite is a sulphide or of zinc and copper glance is a sulphide ore of copper.

Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a forth flotation method.

Choose the most appropriate answer from the options given below :

1. A Statement I is true but Statement II is false.
2. B Both Statement I and Statement II are true. Correct answer
3. C Statement I is false but Statement II is true.
4. D Both Statement I and Statement II are false.