The $d$-block elements consist mostly of

Which of the following statements is not correct? $(Ve = 58, \, Lu = 71, \, La = 57, \, Yb = 70)$

Correct statement for $3d-$ series is

Which of the following is a transition element?

How many of the following metal ions have similar values of spin-only magnetic moment in the gaseous state?
(Given: Atomic number: $V, 23; Cr, 24; Fe, 26; Ni, 28$)
$V^{3+}, Cr^{3+}, Fe^{2+}, Ni^{3+}$

Which of the following is not true for transition metals?