I have other job offers, but I find that this is the best job offer of them all.
That would depend on if you have another job offer. It is seldom appropriate to lie to a prospective employer. However you do not have to answer such a question and quite reasonably answer that you would prefer not to answer the question. It may be advantageous, if you have another offer, to explain that you are making comparisons. Unfortunately this also may be to your disadvantage. There is no single 'correct' answer to any such question.
No known rights. The employer owns the job, and gives and takes it as he wishes. You have no right to stay until it is convenient to leave.
When an employer asks you for your motivations in seeking to receive the given job, he/she is really asking "why do you want this job?" in a slightly more complicated way.
Certainly. The employer OWNS the job - you don't. The employer can change it as he/she sees fit, or cancel it, or give it to another. You have no right to "your job".
You might get a job offer over the phone.
No, they are under no obligation to find you a job.
To introduce your educational background in a job interview wait until the employer you would like to be hired by asks your for your experience and your qualification.
An employer is the person who gives an employee a job.
Read the job application carefully to determine the information that the employer wants to receive. When an employer asks for country information, they may want to know the name of the country that you current live in - or countries that you'd like to work in. In the U.S., it is illegal for employers to ask the names of countries where you have citizenship. Employers can only ask if you have the authorization to work in the U.S.
Ask your employer ... :)
Seeking a job referral from a current employee is not typically considered a standard step in the process of securing a job offer. It's often seen as a supplementary strategy for enhancing one's chances of being noticed by an employer.
Why bother to rescind the offer? Just fire the offender.