The sixth amino acid in beta- hemoglobin polypeptide is Glutamic Acid (Glu). The codons for Glu are GAA or GAG. Individuals who have sickle cell anemia have a Valine (Val) at this position. Two of the codons for Valine are GUA and GUG. At the protein level what kind of mutation is this

the correct option is option d

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.

its probably to later but whats the question