Question

Which of the following option is the only correct combination?

• A. $III,iii,P$
• B. $I,iv,Q$
• C. $IV,I,Q$
• D. $II,i,R$

Answer 1

The correct option is D $II,i,R$

$P=16,Q=17,R=18,S=19$

$(a{)}^3{C}_3=1,(b{)}^1{C}_4$ not possible $(c{)}^{4}C{X}_1=4,(d{)}^2{C}_1=2$

from $\left(a\right),{}^3{C}_3=P16\ne 1$

$\left(b\right)$ not possible

$(c{)}^4{C}_1=4\ne Q=17$

$\left(d\right)n^2{C}_1=2n=18\Rightarrow n=9=3^2$ (also $18$ in divisible by $2$)

so, option $\left(d\right)$ is correct