In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

Question: What are the names of the five major eastern tributaries of the Indus River? Passage:The word Punjabi (sometimes spelled Panjabi) has been derived from the word Panj-ab, Persian for "Five Waters", referring to the five major eastern tributaries of the Indus River. The name of the region was introduced by the Turko-Persian conquerors of South Asia and was a translation of the Sanskrit name for the region, Panchanada, which means "Land of the Five Rivers". Panj is cognate with Sanskrit () and Greek (pente) and Lithuanian Penki - "five", and "ab" is cognate with Sanskrit (ap) and with the of . The historical Punjab region, now divided between India and Pakistan, is defined physiographically by the Indus River and these five tributaries. One of the five, the Beas River, is a tributary of another, the Sutlej.
b