Answer:
Correct option is B.
Step-by-step explanation:
Beta particles are known as the electrons which obtains in the nucleus when a neutron divides into an electron, and a proton. The electron is emitted at a very high-speed, but the proton stays in the nucleus. Since an electron contains -1 charge, and a beta particle also contains -1 charge.
So, beta particle is known as the type of radiation which consists of a fast stream of negatively charged particles.