The correct option is C uniformly accelerated motion.
The maximum magnitude of their resultant is,
Fmax=50+35=85 N
The minimum magnitude of their resultant is,
Fmin=50−35=15 N
Therefore, the net force will be,
15≤Fnet≤85
It is clear that, in any case, the resultant force acting on the body will be greater than zero.
So, the body will move with uniform acceleration.
Hence, option (C) is the correct answer.