b -blockers are used in all except?

Ans. is 'c' i.e., Variant angina We all know that attacks of variant angina occur due to coronary vasospasm. So, the drugs which relieve coronary vasospasms will be used in variant angina (C.C.B.'s, Nitrates) b blockers are contraindicated in these patients because 13 blockers, instead of dilating the coronary aeries constrict the coronary aeries (due to unopposed a mediated constriction). Remember, blockers are useful in classical angina. (They cause ourable redistribution of blood)