A boutique trader believes that supplier prices and customer lists must stay strictly confidential. The lesson treats this concern under the "Secrecy" factor. Which form does it identify as most aligned with maximum secrecy of business information?

1. Secrecy is the fifteenth factor in the lesson. 2. A sole proprietor alone holds all sensitive trading information without sharing. 3. Partnerships dilute that secrecy across partners. 4. Companies must place board, shareholding and financial statements in the public domain. 5. So the lesson assigns maximum secrecy to sole proprietorship. _Source: ICSI CS Executive Paper 3 (Setting up of Business Entities and Closure) — Lesson 1: Choice of Business Organisation, pp. 2-11._