List-I  | List-II  | ||
| (A) | Van Arkel Method | (I) | Copper | 
| (B) | Zone Refining | (II) | Titanium | 
| (C) | Mond Process | (III) | Germanism | 
| (D) | Electrolytic Refining | (IV) | Nickel | 
Rearrange the following parts to form a meaningful and grammatically correct sentence: 
P. a healthy diet and regular exercise 
Q. are important habits 
R. that help maintain good physical and mental health 
S. especially in today's busy world