a) $${\text{yz}}$$
b) $$\frac{{{\text{xz}}}}{{\text{y}}}$$
c) $$\frac{{{\text{xy}}}}{{\text{z}}}$$
d) $${\text{xyz}}$$
Answer: d
Explanation: Ratio of the numbers = x : y
HCF of the numbers = z
So, z is the common factor of the numbers
Then, First number = xz
Second Number = yz
First Number × Second Number = HCF and LCM of the numbers
xzyz = z × LCM
LCM = xyz
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