It D because I hade this too so it is D
It is - not stereospecific
, a reaction in which the stereochemistry of the reactants controls the outcome of the reaction; - bimolecular at rate-determining step
, it involves two molecules; - first order, - rates is governed by the stability of the carbocation that is formed.
Answer is
(HMAC)
Hashed Message Authentication Code
This combines authentication via a shared secret
cryptography algorithm key with hashing. It involves the client and server each
with a private key. The client creates a unique hash per request to the server
through hashing the request with private keys.
