Table:
text: Indian general election in Tamil Nadu, 1977
List of Elected MPs
List of Elected MPs
Constituency Winner Party Margin Runner_up_a Party_a
Dindigul K. Maya Thevar ADMK 169224 A. Balasubramaniam CPM
Madurai R. V. Swaminathan INC 134345 P. Ramamurthi CPM
Periyakulam S. Ramasamy ADMK 204392 Palanivel Rajan DMK
Karur K. Gopal INC 145520 M. Meenakshi Sundaram NCO
Tiruchirappalli M. Kalyanasundaram CPI 76045 Y. Venkateswara Dikshidar NCO
Perambalur A. Asokaraj ADMK 180027 J. S. Raju DMK
Mayiladuthurai N. Kudanthai Ramalingam INC 74265 S. Govindasamy NCO
Nagapattinam S. G. Murugaiyan CPI 40810 M. Thazhai Karunanithi DMK
Thanjavur S. D. Somasundaram ADMK 97743 L. Ganesan DMK
Pudukkottai V. S. Elanchezhiyan ADMK 223615 V. Vairava Thevar NCO
Sivaganga P. Thiagarajan ADMK 211533 R. Ramanathan Chettiar NCO

Question: Give the total number of runners-up a for Perambalur in the Indian general election in Tamil Nadu, 1977?