৫০. What is the time ———— your watch?

Correct Answer: (C) by Preposition usage with time and instruments is a classic area tested in NTRCA English grammar sections. Why 'by' is correct: — "What is the time by your watch?" = What time does your watch show? — 'by' is used to indicate the source or instrument of measurement — "By your watch" means "according to your watch" or "as shown by your watch" — This is a standard English expression for asking the time as indicated by a specific timepiece Common preposition patterns with time: — by your watch / by the clock = according to the watch/clock — at noon / at midnight / at night = specific time points — in the morning / in the afternoon / in the evening = parts of the day — on Monday / on the 5th = specific days and dates Why other options are wrong: ✗ in: used for months, years, seasons, and parts of the day ("in the morning", "in 2024") ✗ at: used for specific times ("at 5 o'clock", "at noon") — not for "according to your watch" ✗ to: used in time expressions like "ten to five" = 4:50 — different usage Source: Oxford English Preposition Guide; Wren & Martin English Grammar; Past NTRCA Question Bank.