Explanation:

- We have nine people divided into three departments: Marketing, Production, and Operations.

- At least two people work in each department. No department has more than four people.

- B and E work together. Since B can't work in Marketing, they must be in Production or Operations.

- H and G work in the same department but not with A or M. This means H and G can't be in Production or Operations.

- J, K, and L work in the same department, leaving only Marketing as no limitations were given for them.

- M is in Operations, and since B is not in Marketing, B and E must be in Production as A is already there.

Therefore, B works in the Production department.

Option 2: Production

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