A watch which gains uniformly is 2 minutes low at noon on Monday and is 4 min. 48 sec fast at 2 p.m. on the following Monday. When was it correct?
A. 2 p.m. on Tuesday B. 2 p.m. on Wednesday
C. 3 p.m. on Thursday D. 1 p.m. on Friday

• 2min slow at monday noon.
  4min 48 sec fast at 2pm next monday..
  it ran faster than normal time by 6 min 48 secs(=408 sec) in 7 days 2 hours(= 170 * 3600 sec).
  it was correct when it advanced 2 min than normal time..
  the watch,
  runs faster by 408 sec in 170*3600 sec
  ,, ,, ,, 120 sec in 50* 3600 sec= 50 hours.
  Therefore it gave correct time after 50 hours from monday noon..
  ans:: wednesday 2 pm..
  ans::: B
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