Answer:
The correct answer is option B.
Step-by-step explanation:
J.J Thomson was an English physicist who had given the plum pudding model of the atom in 1904. In which he described about the existence of two subatomic particles which are protons (positive particles) and electrons (negative particles).
In his model atom was considered to be a pudding or bed of positive charge in which negative particles are present same as as plum on the pudding.