Most streaming rips available online compress the audio to stereo (2.0) to save file size.
However, I must point out that this keyword string strongly indicates a pirated release of the web series Jee Karda (starring Madhuri Dixit, streaming on Amazon Prime Video). The terms "WEB-DL," "exclusive," and specific technical tags (DD51 for Dolby Digital 5.1) are commonly used by unauthorized distribution groups. jee karda season 1 webdl hindi dd51 1080p exclusive