Which of the following reagent is suitable for the preparation of the product in the above reaction?

What is the correct order of the following elements with respect to their density?

Match List - I and List - II.

	List I		List II
(a)	Valium	(i)	Antifertility drug
(b)	Morphine	(ii)	Pernicious anaemia
(c)	Norethindrone	(iii)	Analgesic
(d)	Vitamin $${B_{12}}$$	(iv)	Tranquilizer

The correct shape and $$I - I - I$$ bond angles respectively in $$I_3^ - $$ ion are :