Which of the following is injected in the body through ant bite? 

Acidic liquids 

The correct answer is option 1. Acidic liquids.

Ants have specialized glands that produce venom, and when they bite, they inject this venom into the target. The venom of ants, especially certain species like fire ants, contains formic acid. Formic acid is a simple carboxylic acid with the chemical formula HCOOH.

When an ant bites and injects formic acid into the skin, it can cause pain, irritation, and sometimes an allergic reaction in individuals who are sensitive to ant venom. The acidity of formic acid contributes to the burning sensation experienced during and after an ant bite.

So, the injection from ant bites involves the delivery of an acidic liquid (formic acid) into the body, explaining why the correct option is "Acidic liquids."