Question

The Number of teeth and age of a person may vary-​

Answer 1

$\huge\mathbb\fcolorbox{red}{lavenderblush}{✯Aɴsᴡᴇʀ࿐}$

The number of teeth and the age of a person vary sometimes directly and sometimes inversely with each other, we cannot predict about the number of teeth with exactly the age of a person. It change with person-to-person. Hence, option (d) is correct

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