Concept:Consumer protection laws regulate business transactions to ensure fair and safe dealings.Explanation:The Sales of Goods Act directly governs the sale and purchase of goods.It lays down rules that make transactions fair and protect buyers from defective products and dishonest sellers.While copyright, company, and partnership acts regulate other aspects, they do not primarily serve as consumer protection legislation.Therefore, among the given options, the Sales of Goods Act is the relevant consumer protection law.Answer:D. Sales of Goods Act