Answer- D
In the Hindi language category, Suryanath Singh won the Bal Sahitya Puraskar for his collection of short stories, 'Kotuk App'.
In Marathi language, Eknath Avhad has won the Bal Sahitya Puraskar for his 'Chhand Dei Aanand' while Vishakha Vishwanath has won the Yuva Puraskar for 'Swatahala Swataviruddh Ubhe Kartana'.
Hence, option 'D' is correct.