Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Name the most margin for nco party and p. ramachandran won

### Inputs:
table_name: table, columns: ['Constituency', 'Winner', 'Party', 'Margin', 'Runner-up a', 'Party a']

### Response:
SELECT MAX Margin FROM table WHERE Party = NCO AND Winner = P. Ramachandran