The correct options are
A Flow in both the tubes are steady
B Flow in both the tubes are turbulent
C Flow is steady in A but turbulent in B
Reynolds number, R = ρudμ
where ρ = density, u = mean velocity, d = diameter and μ = viscosity
We know flow is Turbulent if R > 4000
In identical tubes, if volume V flows through A and 2V flows through B in a given time, then mean velocity,u in tube B is greater than that in A
uB > uA
⟹ RB>RA
option(D) ⟹ RA > 4000
⟹ RB > RA > 4000
So RB > 4000 ⟹ Flow is turbulent in B
option (C) ⟹ RB > 4000 , 2000 > RA is possible
(A)(B) options are also possible