Bee sting contains:
A. an acidic liquid
B. a salt solution
C. an alkaline liquid
D. an alcohol

Hint: In order to answer this question, to know about the sting of a Bee, we will discuss the mechanism and why bee sting is painful, due to which type of solution, it's so painful and swollen the flesh. We will discuss more about the liquid present in bee’s sting.

Complete answer:
The main toxic component of bee venom is apitoxin or melittin. It is a peptide that comprises 50-55% venom, hyaluronidase. It is acidic in nature and is neutralized by a base.
Despite the fact that it is broadly accepted that a specialist bumble bee can sting just a single time, this is a fractional confusion: albeit the stinger is truth be told pointed so it lodges in the casualty's skin, tearing free from the honey bee's mid-region and prompting its demise in minutes, this possibly occurs if the skin of the casualty is adequately thick, for example, a mammal's. Honey bees are the lone Hymenoptera with an emphatically spiked sting, however yellow coats and some different wasps have little thorns.
Hence the correct answer is an option (A).

Note:
A bumblebee that is away from the hive scrounging for nectar or dust will seldom sting, with the exception of when stepped on or generally taken care of. Bumblebees will effectively search out and sting when they see the hive to be compromised, regularly being made aware of this by the arrival of assault pheromones (underneath).