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Increase in heartbeat, occurrence of perspiration, shivering and fits indicates
a. Schizophrenia
b. Attention deficit disorder
c. Obscessive compulsive disorder
d. Anxiety disorder

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Answer
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Hint: Heart disease is a variety of conditions that affect your heart. Diseases under the guts disease umbrella include vas diseases, like arteria coronaria disease; regular recurrence problems (arrhythmias); and heart defects you're born with (congenital heart defects), among others.

Complete answer:
Anxiety could be described as a normal emotion. It's the brain's way of reacting to worry and alerting one in all potential danger ahead hence it's a natural response to fret. It’s a sense of fear or apprehension about what’s to come back. Anxiety disorders are the foremost common type of emotional disturbance and may affect anyone at any age.
Symptoms:
Common anxiety signs and symptoms include:
• Feeling nervous, restless or tense.
• Having a way of impending danger, panic or doom.
• Having an increased pulse.
• Breathing rapidly (hyperventilation).
• Sweating and trembling.
• Feeling weak or tired.
• Having trouble sleeping.
• Experiencing gastrointestinal (GI) problems.
• Having difficulty controlling worries and having the urge to avoid things which trigger anxiety.

Hence, the correct answer is option (D).

Additional information:
> Schizophrenia may be defined as a serious upset within which people interpret reality abnormally. Schizophrenia involves a spread of problems with thinking (cognition), behavior and emotions. Signs and symptoms may vary, but usually involve delusions, hallucinations or disorganized speech, and reflect an impaired ability to function.
Other symptoms include:
• Withdrawal from friends and family.
• A call in performance in class.
• Trouble sleeping.
• Irritability or depressed mood.
• Lack of motivation.

> Attention deficit disorder (ADD) may be a disorder that causes a spread of behavior problems like difficulty progressing to instruction, that specialize in schoolwork, maintaining with assignments, following instructions, completing tasks and social interaction.
ADHD symptoms can:
• Change with age.
• Change looking on matters or the environment someone is in.
• Differ looking on the gender of the individual.
• Range in severity, from mild to severe.
• Increase in severity during times of stress.

> Obsessive-compulsive disorder (OCD) could be a psychological state that causes repeated unwanted thoughts or sensations (obsessions) or the urge to try to do something over and once more (compulsions). Some people can have both obsessions and compulsions.
OCD comes in many forms, but most cases comprise a minimum of one among four general categories:
• Checking, like locks, alarm systems, ovens, or light switches
• Symmetry and ordering, the necessity to own things lined up in a very certain way
• Ruminations and intrusive thoughts, an obsession with a line of thought.

Note: A beating heart contracts and relaxes in a very continuous cycle.
• During contraction (systole), your ventricles contract, forcing blood into the vessels to your lungs and body.
• During relaxation (diastole), the ventricles are full of blood coming from the upper chambers (left and right atria).