What is the effect of acetylcholine on the heart rate?

When a normal man's heart is injected with a physiological concentration of adrenaline,it causes:

Heart beats are accelerated by

How do parasympathetic neural signals affect the working of the heart?

Heart rate is increased by all the following except:

Which of the following factors increase the heart rate?
$(A)$ Sympathetic nerve signals
$(B)$ Parasympathetic nerve signals
$(C)$ Adrenal medullary hormones
$(D)$ Vagus nerve
$(E)$ Thyroxine hormone
$(F)$ Acetylcholine