Match the following
| List I | List II | ||
|---|---|---|---|
| I. | Helical virus | A. | Bacteriophage |
| II. | Glycoprotein | B. | Rabies virus |
| III. | Complex viruses | C. | Influenza virus |
| IV. | Enveloped virus | D. | Measles virus |
Match the following:
In the following, \( [x] \) denotes the greatest integer less than or equal to \( x \). 
Choose the correct answer from the options given below:
For x < 0:
f(x) = ex + ax
For x ≥ 0:
f(x) = b(x - 1)2