1) are you still a muslim?
2) did you reconvert to Hinduism before your marriage to sikh ?
3) under provisions of hindu marriage both parties have to be Hindus
4) your marriage is a nullity if you were a muslim at time of marriage .
5) you have to move court for declaration that your marriage is null and void
6) According to the Preamble to the Hindu Marriage Act, 1955: “An Act to amend and codify the law relating to marriage among Hindus. Section 5 of the Act makes it clear that a marriage may be solemnised between any two Hindus if the conditions contained in the said Section were fulfilled. In other words, in the event the conditions remain unfulfilled, a marriage between two Hindus could not be solemnised.”
7) the SC has held that marriage between hindu and person professing another faith solemnised under hindu customs was a nullity