In what months is the hour hand adjusted when finding North with a watch in British Summer Time?

The hour hand of a watch is adjusted when using it as a compass to determine North, especially when in British Summer Time. During British Summer Time, the clocks are set forward by one hour, which affects how the hour hand points relative to magnetic North.

When using a watch to find North, you typically position the watch so that the hour hand points directly at the sun. The midpoint between the hour hand and the 12 o'clock mark on the watch face will indicate North. Since British Summer Time lasts from late March to late October, this is the critical period when the hour hand is indeed adjusted to account for the one-hour advancement in time.

Thus, the correct answer highlights the months from April to October as the time frame during which the adjustment to the hour hand is necessary. During these months, the time displayed on the watch needs to be corrected to be in alignment with solar time for accurate navigation using the watch.

The other options do not capture the entire span of British Summer Time, hence are incorrect as they either refer to months outside of that period or suggest the hour hand is adjusted year-round, which is not the case since the adjustment is specifically relevant during the daylight saving months.