CREATE TABLE table_78849 ("Main contestant" CLOB, "Co-contestant  ( Yaar vs. Pyaar ) " CLOB, "Date performed" CLOB, "Scores by each individual judge" CLOB, "Total score/week" CLOB, "Position" CLOB, "Status" CLOB)

Who is the co-contestant (yaar vs. Pyaar) with Vishal Singh as the main contestant?
SELECT "Co-contestant (Yaar vs. Pyaar)" FROM table_78849 WHERE "Main contestant" = 'vishal singh'
SELECT "Co-contestant (Yaar vs. Pyaar)" FROM "table_78849" WHERE "Main contestant" = 'vishal singh'