Q.Which of the following is used as tranquilizer ?

Tranquilizers are chemical compounds used to treat stress and mental illness of varying severity, relieving anxiety, stress, irritability or excitement and inducing a sense of well-being; because of this calming action they are also a component of many sleeping pills. Different tranquilizers work through genuinely different mechanisms. Where depression is caused by a chemically low level of the neurotransmitter noradrenaline (which is linked to mood), antidepressant drugs work by inhibiting the enzymes that degrade noradrenaline, so it persists longer in the body and remains available to keep activating its receptor, counteracting the depressive effect - which is why an enzyme-inhibiting antidepressant, rather th …