MCQOPTIONS
Saved Bookmarks
| 1. |
Substances which can remain in soil for many years are called as |
| A. | insecticides |
| B. | microorganisms |
| C. | dichloro-diphenyl tricholoroethane |
| D. | dichloro-triphenyl dichloroethane |
| Answer» D. dichloro-triphenyl dichloroethane | |