The correct order of the complexes $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}(\mathrm{A}),\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}(\mathrm{B}),\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}(\mathrm{C})$ and $\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_5\right]^{2+}(\mathrm{D})$ in terms of wavelength of light absorbed is

Which of the following statements are correct?

A. The process of adding an electron to a neutral gaseous atom is always exothermic.

B. The process of removing an electron from an isolated gaseous atom is always endothermic.

C. The $1^{\text {st }}$ ionization energy of boron is less than that of beryllium.

D. The electronegativity of C is 2.5 in $\mathrm{CH}_4$ and $\mathrm{CCl}_4$

E. Li is the most electropositive among elements of group I.

Choose the correct answer from the options given below:

$$ \text {Identify }[\mathrm{A}],[\mathrm{B}] \text { and }[\mathrm{C}] \text {, respectively in the following reaction sequence : } $$

$$ \text { Match the LIST-I with LIST-II } $$

LIST-I (Molecules/ion)		LIST-II (Hybridisation of central atom)
A.	$$ \mathrm{PF}_5 $$	I	$$ \mathrm{dsp}^2 $$
B	$$ \mathrm{SF}_6 $$	II	$$ \mathrm{sp}^3 \mathrm{~d} $$
C	$$ \mathrm{Ni}(\mathrm{CO})_4 $$	III	$$ \mathrm{sp}^3 \mathrm{~d}^2 $$
D	$$ \left[\mathrm{PtCl}_4\right]^{2-} $$	IV	$$ \mathrm{sp}^3 $$

$$ \text { Choose the correct answer from the options given below: } $$