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The liquid crystal method is applicable ...

The liquid crystal method is applicable to locate a vein in the body because

A

blood pressure of vein is enough high

B

temperature of vein is slightly lower than that of the skin

C

the electric field produced is sufficient to produce the polarity

D

geometry of haemoglobin molecule is like a liquid crystal

Text Solution

Verified by Experts

The correct Answer is:
B
The colour of a liquid crystal changes with temperature.
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