Zigzag machines are divided into two categories: a. overlock and serger. b. fully atuomatic and semiautomatic. c. manual and automatic. d. variable speed manual.

Th answer is option B.

Explanation:

A self-loader transmission additionally is known as a grip less manual transmission, auto-manual, computerized manual transmission, trigger move, flappy-paddle outfit move, Manumatic, Tiptronic, Touchshift, Geartronic, Sportronic or oar move gearbox is a car transmission that consolidates manual transmission. A twofold activity gun likewise requires just a trigger draw for each round that is discharged however isn't viewed as self-loader since the manual activity of pulling the trigger is the thing that advances the chamber, not the vitality of the first shot.

answerminaret;