Tetany in ALS

A 62 year – old man with an upper gastrointestinal bleeding receives during resuscitation of a cardiac arrest, a massive transfussion: 8 packed red blood cells, 4 units of fresh frozen plasma and 1 pool of platelets. One hour later presents paraesthesias in mouth and fingers, tetany and wheezing. An ECG may reveal the following signs:

a) Short QT interval: 
b) T wave inversion:
c) Heart block:
d) Prolgonged QRS:
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