| List I | List II | ||
| A. | CH3CH2NH2 | I. | N,N-Dimethylamiline |
| B. | ![]() | II. | Ethylamine |
| C. | C6H5NH2 | III. | Aniline |
| D. | C6H5N(CH3)2 | IV. | Trimethylamine |


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