Question

What is your hobby?
1. My hobby is doing bunjee jumping.
2. My hobby is bunjee jumping.
3. My hobby is doing rock climbing.
4. My hobby is rock climbing.
5. My hobby is bowling.
6. My hobby is going bowling.
7, My hobby is doing bowling.
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Which answers are ungrammatical?

Answer 1

1, 3, 6, and 7 are not used.