Question

please answer the question in picture

Answer 1

Option 1, Meera did it right.

See from 0 to t1, position is not defined, so there is no question of velocity.

and after t1 ( t1 to t2) the graph appears straight, so slope of line is constant at all points, i.e velocity is constant (slope of tangent of position v/s time graph gives velocity).

So option 1 suits

hope this helped