Select the incorrect statement. (a) If the zero of vernier scale does not coincide with the zero...

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Select the incorrect statement.
(a) If the zero of vernier scale does not coincide with the zero of the main scale, then the vernier callipers is said to be having zero error
(b) Zero correction has a magnitude equal to zero error but sign is opposite to that of zero error
(c) Zero error is positive when the zero of vernier scale lies to the left of the zero of the main scale
(d) Zero error is negative when the zero of vernier scale lies to the left of the zero of the main scale
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