The power in the supply line is transferred at high voltage

Correct option is D

The correct answer is (d) to minimize power loss

Explanation:
• Electric power in transmission lines is transferred at a high voltage over long distances to rigorously minimize power loss.
• Power loss due to heating is directly proportional to the square of the current ($P = I^2R$).
• For a given amount of power ($P = VI$), increasing the voltage (V) proportionally decreases the current (I), dramatically reducing heating losses.

Information Booster:
• Step-up transformers are utilized at generating stations to elevate the voltage before transmission.
• Later, step-down transformers are used near consumer localities to safely reduce the voltage to standard usage levels.

Additional Knowledge:
to transfer more power (Option a)
• Total power generation depends on plant capacity, not simply on the transmission voltage.
to reduce power loss (Option b)
• While conceptually similar to option (d), standard physics terminology specifically frames this as to "minimize" power loss efficiently. (Option D is preferred by the exam body as the best-fit scientific phrasing).
to flow more current (Option c)
• High voltage specifically results in a lower current across the line to prevent excessive heating and wire melting.
None of the above/More than one of the above (Option e)
• Incorrect, as minimizing power loss is the primary engineering rationale.

So the correct answer is (d)