Quem é o principal concorrente com uma pontuação total de 42/60 e um co-concorrente (Yaar vs Pyaa) de Tina Sachdev?
CREATE TABLE table_name_29 (main_contestant VARCHAR, total_score_week VARCHAR, co_contestant__yaar_vs_pyaar_ VARCHAR)
SELECT main_contestant FROM table_name_29 WHERE total_score_week = "42/60" AND co_contestant__yaar_vs_pyaar_ = "tina sachdev"