Correct Answer: Option C

Explanation

Evaluate (212)\(_3\) - (121)\(_3\) + (222)\(_3\)

(212)\(_3\)  + (222)\(_3\) = 1211\(_3\)

→ 1211\(_3\) - 121\(_3\)

= 1020\(_3\)

There is an explanation video available below.

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