Select the most appropriate option to fill in the blank.
The child has been missing __________ yesterday.

Correct option is C

The correct option to fill in the blank is (c) since.
Explanation: We use “since” with a point of time (yesterday, Monday, 5 p.m., 2010) with perfect or perfect continuous tenses. “Has been missing since yesterday” shows the action started at a definite point and continues till now. (since = तब से)
Example: He has lived here since 2018.
Why other options are incorrect:
• on (पर/को): Used with specific dates/days, but structure here requires the preposition of duration start-point used with perfect aspect; still, “on yesterday” is ungrammatical.
• from (से): “from yesterday” typically needs an end-point (from…to/till) or a different construction; with present perfect continuous state, since is idiomatic.
• for (के लिए): Used with period of time (for two days), not a point of time like yesterday.
Information booster:
• since + point of time; for + period of time.
• Present perfect (continuous) is common with since/for to show an action/state continuing up to the present.