Which consumer right was violated by the vendor when he refused to listen to Ms. C and accept the faulty iron?

The correct option is Right to be heard.

Step-by-Step Explanation:

1. Understanding the Consumer Right: The consumer rights framework protects consumers from exploitation and unfair trade practices. Among these rights, the Right to be heard (also known as the right to representation) guarantees that a consumer's complaints and grievances will receive due consideration and attention at appropriate forums, including from the seller or vendor directly.

2. Analyzing the Vendor's Action: In this scenario, Ms. C approached the vendor with a complaint about a faulty iron. The vendor refused to listen to her grievance or accept the defective product. By shutting down the communication and failing to acknowledge or hear her complaint, the vendor directly violated Ms. C's right to voice her grievance.

3. Why other options are incorrect:
- Right to information refers to the right to be informed about the quality, quantity, potency, purity, standard, and price of goods or services.
- Right to seek redressal refers to the right to seek legal remedies or compensation against unfair trade practices or exploitation. The first step before redressal is having the complaint heard.
- Right to choose refers to the right to be assured access to a variety of goods and services at competitive prices.

Therefore, because the vendor refused to listen to Ms. C's complaint, the Right to be heard was the specific consumer right violated.