Most Common Intra Op Anaphylaxis is due to ANTIBIOTICS/MUSCLE RELAXANTS?

I have 2 queries.

1)Most Common Intra Op Anaphylaxis is due to

ANTIBIOTICS/MUSCLE RELAXANTS?

2)Most SHORTEST ACTING Local anaesthesia is PROCAINE/ CHLORPROCAINE?

Antibiotics

Chlorprocaine

Thank you very much sir