An ice block is floating in a liquid of specific gravity $\rho$ , when ice melts, the level of fluid.

List 1	List II
A) Rise up	P) $\rho =1$
B) Falls down	Q) $\rho >1$
C) Remain unchanged	R) $\rho <1$
D) Fraction of volume of ice block in water is	S) $0.9$
	T) $0.1$

Let's remove the ice block keeping the vacancy intact.

Volume of vacancy, $V_c=\frac{{\rho }_{i}V}{{\rho }_l}$

Volume of melted ice, $V\text{'}=\frac{{\rho }_{i}V}{{\rho }_w}$

Level will rise up, if $V\text{'}>V_i$. Thus, ${\rho }_l>{\rho }_w$.

Level will fall down, if $V\text{'}<V_i$. Thus, ${\rho }_l<{\rho }_w$.

Level will remain same, if $V\text{'}=V_i$. Thus, ${\rho }_l={\rho }_w$.

Fraction of volume of ice block in water is $\frac{{\rho }_i}{{\rho }_w}=\frac{900}{1000}=0.9$