I. Unit should be of suitable size. II. Unit should not be easily r...

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I. Unit should be of suitable size.
II. Unit should not be easily reproducible.
III. Unit should not change with the changing physical conditions like temperature, pressure, etc.
Which of the following statement(s) is/are correct?
(a) Only I
(b) Both I and III
- (c) Only II
(d) I, II and III
\( \mathrm{P} \)
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