L-isomer of a compound 'A' (C₄H₈O₄) gives a positive test with [Ag(NH₃)₂]⁺. Treatment of 'A' with acetic anhydride yields triacetate derivative. Compound 'A' produces an optically active compound (B) and an optically inactive compound (C) on treatment with bromine water and HNO₃ respectively. Compound (A) is :

Match List - I with List - II.

	List - I		List - II
(A)		(I)	Dishwashing powder
(B)		(II)	Toothpaste
(C)	$${C_{17}}{H_{35}}CO{O^ - }N{a^ + } + N{a_2}C{O_3}$$ + Rosinate	(III)	Laundry soap
(D)	$$C{H_3}{(C{H_2})_{16}}COO{(C{H_2}C{H_2}O)_n}C{H_2}C{H_2}OH$$	(IV)	Hair conditioner

Choose the correct answer from the options given below :

Metal deficiency defect is shown by Fe_0.93O. In the crystal, some Fe²⁺ cations are missing and loss of positive charge is compensated by the presence of Fe³⁺ ions. The percentage of Fe²⁺ ions in the Fe_0.93O crystals is __________. (Nearest integer)

If the uncertainty in velocity and position of a minute particle in space are, 2.4 $$\times$$ 10^$$-$$26 (m s^$$-$$1) and 10^$$-$$7 (m) respectively. The mass of the particle in g is ____________. (Nearest integer)

(Given : h = 6.626 $$\times$$ 10^$$-$$34 Js)