Answer:
The correct answer will be option-mammary glands of an orangutan and mammary glands of a whale
Step-by-step explanation:
Homology is the pattern of the evolution which states that the organisms have originated and diversified from a common ancestor.
The organisms which exhibit the same structural structures but they may perform the same or different functions depending on the environment are known as homologous structures.
In the given question, since both orangutan and whale are both mammals and they possess mammary glands which perform the same function. Therefore the are homologous organs.
Thus, the selected option is the correct answer.