The correct answer is (b) not responsible for the bad selection of goods by the buyer.

Caveat Emptor, which is Latin for "let the buyer beware," is a legal principle that places the responsibility of evaluating and selecting goods and services on the buyer. Under this doctrine, the seller is generally not held responsible for the bad selection of goods by the buyer, as it is assumed that the buyer has taken reasonable steps to inspect and examine the goods before making the purchase.

To elaborate further:
1. Buyer's Responsibility: Caveat Emptor signifies that the buyer should be cautious and diligent while purchasing any goods or services. It is the buyer's responsibility to thoroughly examine the product, ask questions, and gather necessary information before making the purchase.
2. Seller's Disclosure: The seller is not obligated to disclose all defects or issues related to the product under the doctrine of Caveat Emptor. However, the seller should not make any false claims or misrepresent the product, as that would constitute fraud.
3. Exception: There are some exceptions to the Caveat Emptor principle, such as in cases where the seller has intentionally concealed defects or has provided misleading information about the product. In such cases, the seller may be held liable for the bad selection of goods by the buyer.
4. Warranties and Guarantees: Some goods and services come with warranties or guarantees, which provide the buyer with additional protection against defects or malfunctions. These warranties and guarantees can be seen as a deviation from the Caveat Emptor principle, as they place some responsibility on the seller.

In conclusion, under the doctrine of Caveat Emptor, the seller is not responsible for the bad selection of goods by the buyer. It is the buyer's responsibility to conduct a thorough inspection and gather all necessary information before making a purchase.