Answer:
Explanation:
Given
acceleration is given by

where 

Also acceleration is given by








at 





when air drag is neglected maximum height reached is


Gamma rays are the highest energy EM radiation and typically have energies greater than 100 keV, frequencies greater than 1019 Hz, and wavelengths less than 10 picometers.
This is something I have no idea
Current flows from High Potential (Positive) to Low potential (Negative)
So, option D is your answer!
Hope this helps!