Hi, I have a few question concerning my 93 integra Ls. (non vtec)

1)Is B18A1 the engine of my car?

2)My AC is not working. I think it is the AC compressor. I am planning to buy and swap the compressor.
Could I swap a compressor from 92 integra GSR vtec?

3) Could I swap any civic's compressor to my car? If yes, what yr and engine spec will they be?

Please give advice to this newbie. Thanks!