Answer:
Option B, Halogens
Explanation:
Halogens are group of chemicals that consists of chemicals such as iodine, chlorine, and fluorine and are used as disinfectant.
Chlorine is the most commonly used halogen. It is sometimes mixed with metals to form compounds such as sodium hypochlorite or Bleach which are used as common household disinfectant
All Hypochlorite compound including sodium and calcium hypochlorites, are used to clean the water of swimming pools.
Hence, Bleach is an example of halogens
Option B is correct.
from seed, grafting and budding, layering, cutting Apple trees will develop promptly from seed, in spite of the fact that the plants that develop from seed generally don't have indistinguishable attractive qualities from either parent tree. To empower seed germination, the apple seeds are isolated from the tissue of develop organic products, permitted to dry and afterward put in a plastic sack with clammy sand, peat greenery or paper toweling and kept somewhere in the range of 40 and 50 degrees Fahrenheit for 70 to 80 days. Stratified seeds are sown around 3/4-inch somewhere down in an all around depleted growing medium that could contain equivalent amounts of peat greenery and sand and kept equitably soggy and warm until the point when the apple seedlings rise.