A child has rigidity and a characteristic convex fixed posture as shown in this photograph. All of the following regarding this abnormal posturing are true except ?

a) This abnormal posturing is an extrapyramidal effect and is caused by spasm of the axial muscle  along the spina column

b) It is called opisthotonus posture

c) It seen only with tetanus

d) It is a symptom of strychnine poisoning

2

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