How to get free from charges of pocso 7/8 , sec 354, sec 452 , 504,506

My bother has been arrested and sent to district jail the applicant is minor girl of 17 yrs 8 months age. She falaely lodge Fir complaining that my brother allegedly came to her home on the occasion of birthday of her younger sister Tanu. And thraeten the applicant Ritika about rape then on next day in morning again Prateek came to her home when ritika was alone at her place as her younger sister Tanu went to school and mother went to temple at that day Prateek tries to remove her clothes and made her naked and tries to do rape. At the same time mother knocked the door then prateek ran away from that place and threaten to life and viral her pics on social media. Also he said in her complain that prateek stops her younger sister in roads and click her pics. So police lodged a FIR on 27/09/2019 under section 354 b ,452 , 504,506 , pocso 7/8 . And send my brother jail after presenting him in front of magistrate. And Now the statements of ritika under 164 has been recorded and she refused to do medical examination. As she said ke mere sath rape ni hua...so she refused the internal and external medical examination. Now I want to know how to get bail and become worry from this case as my brother did nothing like this. As the girl is characterless as she has physical relationships with 3-4 boys and also talked to my bother over phone from last 2 years. Also she took money from my brother many times. She visited kanpur with my brother , her mother and she went to allahabad with my brother , her mother opens a RD of my brother as Rs 600/- per month as the mother of ritika is agent of post office. Now please suggest how to get bail and get rid of such false charges.