Answer : 1. "Bharatiya Janata Party (BJP)"
Explanation :

One of the recipients of the Sansad Ratna Award, Sukanta Majumdar, is from the Bharatiya Janata Party (BJP). Sansad Ratna Awards are presented annually to honor top performing MPs based on their performance in the Lok Sabha. Along with Majumdar, recent awardees include Shrikant Eknath Shinde from Shiv Sena, Sudhir Gupta from BJP, Amol Ramsingh Kolhe from NCP and Kuldeep Rai Sharma from Congress. The award is an important honor in Indian politics, highlighting the contribution and performance of MPs in the Lok Sabha.