One
A wire carrying a current creates a circular field. Not A.
B is pretty uniform. I would pick it.
C The lines bend around the north and south poles. Not C
D Same Remark as C.
Two
- The force exerted by the magnetic field is the palm of your right hand.
- Your thumb is the direction of the charged stream
- The fingers are the direction of B which I take to be into the page.
If all these are in agreement with what you think you have been given then A is the correct answer. The proton will be defected in the direction of the palm.
Three
As stated in One the fingers point in the direction of B, The thumb is the direction of the charge and the palm is the direction of the force when the item is a plus charge. When the travelling charge is minus as this one is, use the back of your hand. In that case, The electron will be deflected downward. This assumes the Magnetic field is pointing into the page.
The answer is A.