| List -I | List-II | ||
| A | Buna-S | I | Vinyl chloride |
| B | Neoprene | II | 1,3-Butadiene and styrene |
| C | PVC | III | Tetra flouroethene |
| D | Teflon | IV | Chloroprene |

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