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 |
The current passing through the battery in the given circuit, is: 
A constant voltage of 50 V is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is :