PDE Q83

C. Pakistan & China 

This question refers to time zones and how crossing certain borders can create a large time difference — in this case, a half-day or 12-hour difference.

Between Pakistan and China, there is an unusual time difference of 3 hours — but the phrase “gains half-a-day” likely refers to situations like:

• China officially follows a single time zone (China Standard Time - UTC+8), even though it spans five geographical time zones.

• Pakistan follows Pakistan Standard Time (UTC+5).

So when you cross from Pakistan into western China, you suddenly "gain" 3 hours. In certain remote border regions, especially when traveling eastward, locals humorously say they’ve "gained half a day" because their day suddenly feels a lot longer.

While it's not literally a 12-hour gain, the phrase is often used informally or figuratively. Why the other options are wrong:

• A. India & Sri Lanka – Same time zone (UTC+5:30), so no gain or loss.

• B. North & South Korea – Same time zone now (UTC+9); even historically, the difference was never close to half a day.

• D. Britain & France – Only 1-hour difference (UTC+0 vs. UTC+1), not significant.

Summary:

• Pakistan & China have a large time jump (3 hours) at the border, which can feel like a dramatic "gain."

• This makes C the best and most appropriate answer to the phrase "It gains half-a-day."