The correct option is indeed "2 and 3 only." In ancient India, guilds (Shrenis) were autonomous associations of artisans and merchants, which had the authority to fix wages, establish work regulations, set quality standards, and determine prices for goods, indicating their role in regulating economic activities independently. Additionally, guilds exercised judicial powers over their members, resolving disputes and enforcing discipline within the group, which reflects their significant influence on both the economic and social fabric of the time. However, the first statement is misleading as guilds operated with a degree of autonomy and did not necessarily require registration with a central authority, highlighting their self-regulatory nature.