Fill in the blank in the sentence given below by choosing the correct option out of those that follow.
He can’t be dishonest. He is ______ board.

Correct option is C

The correct option to fill in the blank is (c) above.
Detailed Explanation (English):
• The expression “above board” is a fixed idiom.
• It means honest, open, and legal (without cheating or hidden motives).
• Since the sentence says “He can’t be dishonest,” the idiom “above board” fits perfectly.
Correct sentence: He can’t be dishonest. He is above board.
Meanings of the other options:
• (a) On: used for position/surface; not used with “board” to mean honesty (पर/ऊपर)
• (b) Off: away from; indicates separation; not idiomatic here (से दूर/हटा हुआ)
• (d) Upon: formal “on”; still not correct with “board” in this meaning (पर)