Answer:
B) The particle would travel in a curved path.
Explanation:
Consider a positively charged particle passes through a magnetic field B
The direction of the velocity of the charged particle is perpendicular to the line of force of the magnetic field.
The charged particle will experience a force and follows a curved path in the magnetic field.
The motion of the charged particle is such that at any instant the direction of the velocity vector of the charged particle is always perpendicular to the line of force.
So, the positively charged particle follows a curved path around the magnetic lines of force.