The correct answer is: B. different.
Rohan and Rohit are twin brothers, but they do not look alike. This is because they are not identical twins. Identical twins are formed when a single fertilized egg splits into two identical embryos. Fraternal twins are formed when two separate eggs are fertilized by two separate sperm. Fraternal twins are no more genetically similar than any other two siblings.
There are a number of reasons why Rohan and Rohit might not look alike. They may have different hair color, eye color, skin color, or facial features. They may also have different body types.
It is important to note that not all identical twins look alike. There can be some variation in their appearance, especially as they get older. This is because identical twins are not 100% genetically identical. They inherit slightly different genes from their parents.
In conclusion, the correct answer to the question “Rohan and Rohit are twin brothers, but they do not look ……” is B. different.