Table:
text: Indian general election in Tamil Nadu, 1991
List of Elected MPs
List of Elected MPs
Constituency Winner Party Margin Runner_up_a Party_a
1. Chennai North D. Pandian Indian National Congress 118518 Aladi Aruna DMK
2. Chennai Central Era Anbarasu c Indian National Congress 103271 N. V. N. Somu DMK
3. Chennai South R. Sridharan Anna Dravida Munnetra Kazhagam 162528 T. R. Balu DMK
4. Sriperumbudur Margatham Chandrasekar c Indian National Congress 180572 K. Sundaram DMK
5. Chengalpattu S. S. R. Rajendra Kumar Anna Dravida Munnetra Kazhagam 153206 C. Arumugam DMK
6. Arakkonam R. Jeevarathinam c Indian National Congress 176710 M. Kannaiyan DMK
7. Vellore B. Akber Pasha Indian National Congress 199169 P. Shanmugam DMK

Question: What is the party if the constituency is 1. Chennai North under the Indian General Elections in Tamil Nadu, 1991?