Two identical nMOS transistors M₁ and M₂ are connected as shown below. The circuit is used as an amplifier with the input connected between G and S terminals and the output taken between D and S terminals, V_bias and V_D are so adjusted that both transistors are in saturation. The transconductance of this combination is defined as  while the output resistance is  where i_D is the current flowing into the drain of M₂. Let g_m1 , g_m2 be the transconductances and r_o1 , r_o2 be the output resistance of transistors M₁ and M₂ respectively

Which of the following statements about estimates for g_m and r_o is correct?