Correct option is B
For holding HT overhead conductors on straight running poles, the type of insulator used is a pin type insulator.
Explanation: Pin type insulators are designed to be mounted on a "pin" on a pole, making them suitable for straight sections of power lines.
Key points about the options:
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Post type insulators: Used in situations where the insulator is directly mounted on a pole without a separate crossarm.
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Stay type insulators: Primarily used for guy wires which provide additional support to poles.
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Shackle type insulators: Usually used in low voltage distribution lines.
