I did a bit of digging around on Bing, I believe they are called:
Some clues:
Further research has taken me further, and leads to an answer!
We discover a whole set of beliefs around kinship, generated by tribes who believe in a human spirit and a parallelism of people with animals.
Such as Australian-Aborigines. This article, which describes the broader ideas of kinship that are involved, uses images like the ones you used in your question (see Martuthunira and Pintupi).
One of the concepts (key to my answer) is that of parallel and cross cousins.
a parallel cousin or ortho-cousin is a cousin from a parent's same-sex sibling, while a cross-cousin is from a parent's opposite-sex sibling
The Kariera tribe gets its own page, while there is very little on the Tarau tribe anywhere. A link from references (Collected Works of James G. Frazer) produces:
with Chapter 4 being on TotemismTotemism.
Several names appear repeatedly, one being:
who appeared to have been the authority on these matters.
After taking all this in, your question begins to make sense.
The answer is:
D. Sibling
because:
The question is asking for the ONLY relationship that belongs to the same clan. Remember A can marry B and their child belongs to C (which removes one parent, aunts and unlces from the possibilites), BUT if they have more than one child (siblings), the siblings belong to the same clan, and so D.