A watch which gains uniformly is 2 minutes low at noon on Tuesday and is 4 min 48 sec fast at 2 p.m. on the following Tuesday. When was it correct ?  Choose the correct choice from the following:
A) 3 p.m. on Thursday.
B) 2 p.m. on Thursday.
C) 4 p.m. on Thursday.
D) 2.10 p.m. on Thursday.
E) 2.40 p.m. on Thursday.
Time from 12 p.m. on Tuesday to 2 p.m. on the following Tuesday = 7 days 2 hours.   = 170 hours.   The watch gains = (2 + 4 x 4/5) min   = 34/5 min. in 170 hrs.   Now, 34/5 min are gained in 170 hrs.   Then, 2 min are gained in (170 x 5/34 x 2) hrs.   Watch is correct after 2 days 2 hrs after 12 p.m. on Tuesday, i.e., it will be correct at 2 p.m. on Thursday.   Answer 2 p.m. on Thursday.
<result>B</result>
A watch which gains uniformly is 2 minutes low at noon on Tuesday and is 4 min 48 sec fast at 2 p.m. on the following Tuesday. When was it correct ?