<prompt> Rate limiting step in catecholamine synthesis:-Phenylethanolamine N-methyltransferaseDopadecarboxylaseTyrosine hydroxylaseTryptophan decarboxylase A  <response>: Catecholamines are epinephrine, norepinephrine and dopamine. L-DOPA is the precursor of all catecholamines The diagram given below shows the synthesis of L-DOPA and the rate limiting enzyme in the synthesis is tyrosine hydroxylase. 