<prompt> The major contributor to semen is from -Seminal vesicleCowpers glandsProstateUrethral gland  <response>: Ans. is a i.e.. Seminal vesicle o Seminal vesicle secretions contributes 60 of total volume of semen.o Beta-2 transferrin is an isoform of transferrin,o It is found in cerebrospinal fluid CSF.o It is not found in other body fluids blood, mucus, tear, saliva, urine,o Therefore, it is a specific marker for CSF and is used for diagnostic of CSF leaks. 