In each column, the number at the end is obtained by multiplying the other three numbers.
Eg : $$3\times4\times3=36$$
and $$5\times6\times7=210$$
Similarly, $$9\times x\times12=36$$
=> $$x=\frac{36}{108}=\frac{1}{3}$$
=> Ans - (C)
Create a FREE account and get: