A regulatory agency (also regulatory authority, regulatory body or regulator) is a public authority or government agency responsible for exercising autonomous authority over some area of human activity in a regulatory or supervisory capacity. An independent regulatory agency is a regulatory agency that is independent from other branches or arms of the government.
A regulatory agency is the same thing as a regulatory body.
A: Yes

Sir is an honorific address used in a number of situations in many anglophone cultures. The term can be used as a formal prefix, especially in the Commonwealth, for males who have been given certain honours or titles (such as knights and baronets), where usage is strictly governed by law and custom.
Sir is used for men titled knights of orders of chivalry, where usage is strictly governed by law and custom.
A: It's impossible to say

Floyd Mayweather Jr. vs. Canelo Alvarez, billed as "The One", was a boxing light middleweight championship superfight. The bout was held on September 14, 2013, in the MGM Grand Garden Arena, at the MGM Grand Hotel & Casino in Las Vegas, Nevada, United States, on Showtime PPV. Mayweather received $41.5 million for this fight before taking into account pay-per-view sales.
Canelo Alvarez is a light middleweight boxer.
A:
Yes