Plzz answer this all questions

Dear student,
Q1.
Option b is correct
An object can accelerate even if its speed is constant - if its direction changes. If an object's velocity is constant, however, its acceleration will be zero.
Q2.
Option a  is correct
The accelerated motion is a motion with a continually increasing velocity. Uniformly extended movement is motion with a regular, uniform change in speed.

Post other questions in a different thread
Regards