$MRI$ was originally discovered in $1946$ by

The instrument by which blood pressure $(B.P.)$ of a human is determined is:

An $X-ray$ of the lower abdomen shows a shadow in the region of the ureter suspected to be an ureteric calculus. $A$ possible clinical symptom would be

In imaging,$NMR$ is superior to $CT$ scanning because

The first human heart transplant was performed by:

The branch of biology dealing with the process of improvement of human race by selective breeding is called