Choose the word which is different from the rest: Barley, Rice, Wheat, Mustard, Bajra.
All except Mustard are foodgrains, while mustard is an oilseed.  A grain is a small, hard, dry fruit with or without an attached hull layer, harvested for human or animal consumption.
The major U.S. oilseed crops are soybeans, cottonseed, sunflower seed and canola.  Soybeans are the dominant oilseed in the United States, accounting for about 90 percent of U.S. oilseed production.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
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Answer the following query.
Choose the word which is different from the rest: Barley, Rice, Wheat, Mustard, Bajra.

user
All except Mustard are foodgrains, while mustard is an oilseed.  A grain is a small, hard, dry fruit with or without an attached hull layer, harvested for human or animal consumption.
The major U.S. oilseed crops are soybeans, cottonseed, sunflower seed and canola.  Soybeans are the dominant oilseed in the United States, accounting for about 90 percent of U.S. oilseed production.
assistant