New Delhi, Jan 24 (Agencies): Veteran Congress leader ND Tiwari on Monday approached the Delhi High Court challenging its order directing him to undergo DNA test on a suit filed by a young man claiming to be his biological son.

Challenging the HC single bench's order, Tiwari filed an appeal before a Division Bench saying he cannot be directed to undergo test.

Tiwari, who had held the posts of Chief Minister of undivided Uttar Pradesh and later Uttarakhand, opposed the paternity suit filed by 31-year-old Rohit Shekhar claiming to be the biological son born out of a relationship between his mother Ujjwala Sharma and the leader.

Tiwari, who had last year resigned as Governor in the midst of allegations of sexual misconduct, had countered the charges claiming that he never had any physical relationship with Ujjwala, who is also a Congress activist, and Rohit was not entitled to seek a DNA test as a matter of right.