JEE Mains 04-Sep-2020 Shift 1 Solved Paper

Velocity at ground (means zero height) is non- zero therefore one is incorrect and velocity versus height is non-linear therefore two is also incorrect.
v2=2 gh
v

dv

dh

=2g=const.

dv

dh

=

constant

v

Here we can see slope is very high when velocity is low therefore at Maximum height the slope should be very large which is in option 3 and as velocity increases slope must decrease there for option 3 is correct.