DPT means Diphtheria, Pertussis and Tetanus. Many people confuse it with polio or TB vaccines but those are separate. This one is given in childhood to prevent whooping cough, tetanus and diphtheria infections.

The interspinous diameter is the narrowest part of the true pelvis. It lies between the ischial spines and limits the space the most during labor. Other diameters like AP or transverse are larger compared to this one.

Isoniazid can cause peripheral neuropathy because it depletes vitamin B6 in the body. That’s why pyridoxine is usually given together to prevent nerve related problems. Other ATT drugs don’t commonly do this.

Catatonic schizophrenia mainly affects motor activity. The patient may show extreme negativism, mutism, or stay in one posture for long time. Sometimes there can be sudden excitement too, but overall motor behavior is the key disturbance here.

In hydrocephalus the fetal head is abnormally enlarged, so applying forceps can be dangerous and ineffective. It increases risk of trauma and delivery is usually managed differently. Other listed conditions can still allow forceps with proper indication.

Instillation means putting medicine in liquid form into a body cavity, like ear drops or eye drops. Inhalation is for breathing meds, insertion is solid forms, and insufflation is blowing powder or gas into a cavity.