A client with advanced-stage Alzheimer's disease is seen by a health care provider who prescribes a newer drug that is not a cholinesterase inhibitor. This drug is a N-methyl-D-asparate (NMDA) receptor antagonist. This drug is better known as:

Dextrorphan

Explanation:

Is one of the most commonly used cough  suppressants in the world and is known to be an NMDA receptor antagonist and its function is linked to that of the array of negative symptoms and are classified as dissociative drugs

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000