How many Y-chromosomes are present in 2^nd polar body in human beings?

The number of Y chromosomes in a polar body is zero (0). 

In human beings, the second polar body is a small, non-functional cell that is formed during the process of oogenesis after the first meiotic division. When a primary oocyte undergoes the first meiotic division, it produces a secondary oocyte and the first polar body. The secondary oocyte then undergoes the second meiotic division, producing the egg (ovum) and the second
polar body. 

Like the first polar body, the second polar body is essentially a small package of discarded genetic material and cellular components. Each polar body normally contains one X chromosome. It does not receive any Y-chromosome because females lack Y chromosome.

(2) The number 23 represents the total number of chromosomes in a human gamete (sperm or egg), which is the haploid number.

(3) The number 2 represents the number of allosomes in a diploid cell. It also represents the number of sets of
autosomes in a diploid cell.

(4) The number 1 represents the number of allosomes or the number of X chromosomes in the second polar
body.