Question

Which of the following is NOT a characteristic of a good unit? A. It is invariable. B. It is reproducible. C. It is perishable. D. It is easily available.

Answer 1

you know properties of a good unit ?
first you should understand how a unit is placed in good unit ?
there are so many properties but some are :-
$\text{(i) It should be easily understandable}$.
$\text{(ii) It should be changed with change in physical factors}$.
$\text{(iii) It should not change with place or time}$.
$\text{(iv) It should be easily duplicated}$.
$\text{(v) It should be in accordance with the}\\\text{ size of the quality to be measured}$.
$\text{(vi) It should be properly defined}$.

from above explanation , you can easily say that which one is correct option?
option (C) is correct.
because unit doesn't perishable it is just change with one form to another form.

$\bf{option\:(C)\: }$

Answer 2

Answer:

option (3)

Explanation:

I hope full thank you