Rama is good . . . . . . . . dancing. A. about B. on C. for D. at

The correct answer is D. at.

Rama is good at dancing. This means that Rama is skilled in dancing and is able to perform it well. The other options are not correct because they do not convey the same meaning.

• About: Rama is not good about dancing. This means that Rama does not know much about dancing or is not interested in it.
• On: Rama is not good on dancing. This means that Rama is not able to dance well or is not comfortable dancing.
• For: Rama is not good for dancing. This means that Rama is not suitable for dancing or is not able to benefit from dancing.

I hope this helps!