Discussion
Assertion (A): The negative terminal is disconnected first when removing a battery.
Reason (R): A spanner touching the body while loosening the positive terminal would short the battery.
Select the correct answer from the options below.
Answer: C
With the earth removed there is no return path, so a tool contacting the body while working on the positive can do nothing. The reason therefore explains the convention exactly, and reconnection reverses the order for the same logic. Naming what changes and what stays the same is the reliable route through questions of this shape. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.
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