Which combination of organic bromide(s) and dicarbonyl compound can be used to prepare the following product (in a multistep synthesis)?

Name: Which combination of organic bromide(s) and dicarbonyl compound can be used to prepare the following product (in a multistep synthesis)?
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Question

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Organic bromide 1 (shown in the image) can be used to perform an alkylation reaction with the dicarbonyl compound, followed by a decarboxylation reaction to yield the product shown.

Which Combination of Organic Bromide(s) and Dicarbonyl Compound Can Be