examination malpractice who is to be blame?
All three. Unless you left something out. Your teacher should teach and offer assistance, you should study and your parents should keep up with how the studying is going. If you can't get help find a free tutor. They nornally have them at most schools.
Even in war we are accountable for our actions.  Every servicemember in Iraq carries an ROE card that explains the conditions under which he may use lethal force.\n\nLets just let the military complete their investigation.